How To Use Vertebrate In A Sentence
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Lobefins today have dwindled to the lungfishes and the coelacanths ‘dwindled’ as ‘fish’, that is, but mightily expanded on land: we land vertebrates are aberrant lungfish.
THE GREATEST SHOW ON EARTH
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A couple of the multicellular test subjects died and the invertebrates had a fifty-fifty survival rate.
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The relationships between hagfishes, lampreys, and jawed vertebrates are one of the still-unresolved problems in craniate phylogeny.
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A large brain relative to body size is an almost universal foetal characteristic of vertebrates, and certainly of mammals.
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E.g. the genes are found in sea urchins and other non-vertebrate deuterostome genomes.
Assessing Applegate's Attack
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Neither type corresponds precisely to that seen in vertebrate enamel, and the extreme variation in crystal orientation is puzzling.
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Following Simpson, Newell mentioned the example of the relatively wider limb bones of larger land vertebrates.
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A postdoctoral position, funded by the Leverhulme Trust, is available to work with Dr Tokiharu Takahashi on the evolutionary origin of multiple cell lineages in vertebrate haematopoiesis.
Naturejobs - All Jobs
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In addition to fish, Pterois volitans feed on invertebrates such as amphipods, isopods, and other crustaceans.
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There are more than 50 fish species whose lives are linked to Sargassum, and a myriad of invertebrates, including gastropods, polychaetes, bryozoans, anemones, and sea-spiders.
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Melanic forms of invertebrates might have advantages in thermoregulation and UV-B radiation protection [174].
Phenotypic responses of arctic species to changes in climate and ultraviolet-B radiation
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The vertebrates are characterized by the presence of a bony skeleton and a brain.
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Tropical marine invertebrates, unlike marine fish which are notoriously difficult to successfully breed in captivity, are far more accommodating.
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This is probably one of the most archaic sensory receptors, which is present even in invertebrates such as the roundworm, leech or aplysia Time-surface temperature thresholds for thermal injury of Human skin.
PLoS ONE Alerts: New Articles
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The temperature at which the eggs of ectothermic vertebrates incubate can influence several phenotypic traits of offspring.
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Fish eat snails in their shells and hard-shelled crustacea as well as invertebrates with exoskeletons.
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Other descendants of the marine invertebrates have also left the water.
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The distribution, water chemistry, ecology, hydrology, limnology, and invertebrate and amphibian fauna of vernal ponds have been investigated.
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As evidenced by the articles in this volume, a recent increase in interest in the mating systems of poikilothermic vertebrates has focused primarily on fishes, a few amphibians, and squamate reptiles.
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Scientist Kristin Tessmar-Raible from Arendt's lab directly compared two types of hormone-secreting nerve cells of zebrafish, a vertebrate, and the annelid worm Platynereis dumerilii, and found some stunning similarities.
2007 June - Telic Thoughts
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Their diet consists primarily of parasitic copepods and other invertebrates that are taken from the mouth and gill openings of larger fish.
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This jawless mouth sets the lamprey and its cousin the hagfish apart from all other modern vertebrates - animals with backbones.
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The origin of vertebrates has always been a core question in evolutionary biology. It is well accepted that vertebrates and invertebrate chordate derived from a common ancestor.
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The heart appears to be the most primitive of all adult vertebrates, with the auricle, ventricle and conus arteriosus arranged in straight line, rather than being doubled over one another.
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Mites and ticks which feed on vertebrate hair or blood often carry disease organisms, such as spirochete bacteria, responsible for relapsing fever and Lyme disease.
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In fact, the candiru is one of a very few vertebrate parasites that targets humans.
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The processes of cell signaling important in inducing new tissues during gastrulation are similar in all vertebrates, and the same answers are turning up in fish and mice, despite the morphological differences in their layouts.
A bit more on Haeckel - The Panda's Thumb
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The containing group of jawed vertebrates and jawless fishes is vertebrata.
A New Book
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Recent modeling studies have focused on systems such as vertebrate jaws, limbs, tongues and tentacles and axial muscle.
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Marine invertebrates feast on the wood, attracting other creatures from little fish, to birds and sharks.
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Thomisids are among the favourite prey of insectivorous birds and other invertebrates.
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Unlike all other jawed vertebrates, placoderms never had teeth, and did not descend from toothed ancestors.
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Thus shear loading mechanisms may play a central role in integrative models of the vertebrate body axis.
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Larger species of marine invertebrates that brood their young have evolved special ventilation mechanisms.
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The fate maps of the different vertebrates are thus similar when one looks at the relationship between the germ layers and the site of ingression of cells at gastrulation.
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Numerous recent studies in vertebrate paleontology have focused on reconstructing the ecology of terrestrial fossil communities.
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The notochord is a continuous rod of cartilage, or gristle, which in the embryological growth of vertebrate animals supports the spinal nerve cord before the formation of the vertebrae.
The Elements of Geology
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Public aquariums are a good source of information regarding the status of captive breeding of invertebrates.
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Most other closely related wrasses utilize a combination of suction and biting to take less elusive invertebrate prey items.
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Xu notes that, except for exhibitions or scientific exchanges, it is against the law to export vertebrate fossils - fossils of animals with backbones - from China.
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The axolotl is the champion of vertebrate regeneration, with the ability to replace whole limbs and even parts of its central nervous system," says Edward Scott, Ph. D., principal investigator for the grant and director of the McKnight Brain Institute's program in stem cell biology and regenerative medicine.
GEN News Highlights
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All trematodes are parasitic, and most adult trematodes parasitize vertebrates.
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Other important components of the fringing reef ecosystem include algae (brown, red and green), marine invertebrates (shrimp, lobster, crabs and sea urchins) and fishes (parrotfish, wrasses, damselfish, surgeonfish, goatfish, jacks and sharks).
Hawaiian Islands Humpback Whale National Marine Sanctuary
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Sponges make up 70% of their diet with the rest of their diet consisting of gorgonian polyps, other invertebrates, and algae.
Coral reef fish feeding behavior in the Caribbean
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Small fish begin by feeding upon zooplankton, mainly cladocera, such as daphnia, before moving onto bloodworm and larger invertebrates as they grow.
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The invertebrates are choking fishing nets and poisoning the catch with their toxic stingers, fishers say.
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Today, scientists can offer a real-life glimpse of this developmental bifurcation by pointing to vertebrates, such as zebrafish, that retain pharyngeal teeth only; others, such as mouse and human, that have oral teeth only; and a subset, including cichlids, that thrives with both.
Emaxhealth
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Owing to the difference of development he would not homologise these bones in the newt with the palatine and pterygoid of other Vertebrates.
Form and Function A Contribution to the History of Animal Morphology
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Parasitism is a common phenomenon in many animal taxa, from simple platyhelminths to vertebrates such as fish and birds.
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Myriapod animals were probably one of the invertebrate animal groups that first colonized the terrestrial ecosystem during Early Paleozoic.
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Most investigation into such an antipredatory benefit has focused on caudal autotomy in vertebrate taxa.
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The saw is also used as a digging tool to probe in mud and sand in search of crustaceans and other small invertebrates.
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The temperature at which the eggs of ectothermic vertebrates incubate can influence several phenotypic traits of offspring.
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I just want to send a big congratulations out there to my friend Laura Wilson whose first published paper "Comparative taphonomy and paleoecological reconstruction of two microvertebrate accumulations from the Late Cretaceous Hell Creek Formation Maastrichtian, eastern Montana" came out in the new issue of PALAIOS today.
CONGRATS LAURA!!!
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Aquatic invertebrates are also eaten, especially by breeding females and the young.
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Microsporidian can infect a wide rage of the invertebrates and vertebrates, especially including the economic insect, fish, rabbits, fur animal, nibbling the teeth and primate.
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Planktonic larvae, also known as "meroplankton" are the most common early life stage of marine invertebrates, many of whom live on the bottom as adults.
Planktonic larvae
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Among vertebrates, newts and other urodele amphibians show a remarkable capacity for regeneration.
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In vertebrates, the smallest number of research citations on these peptides are commonly in the cyclostomes and elasmobranchs.
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I also read more of the December issue of the Journal of Vertebrate Paleontology — "Comparison and biomechanical interpretations of the vertebrae and osteoderms of Cacops aspidephorus and Dissorophus multicinctus (Temnospondyli; Dissorophoridae)," and "A possible new ctenosauriscid archosaur from the Middle Triassic Manda Beds of Tanzania.
What I Did During My Plague Vacation ( by Me)
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Several of the only known localities for endemic harvestman, spiders, land snails, and other invertebrates have been heavily altered or lost through logging within the last decade, and the current status of these species is unknown.
Klamath-Siskiyou forests
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This dive is better in the deeper section, where large gorgonian seafans stretch out into the current, surrounded by large numbers of fish, corals, invertebrates, and some huge barrel sponges.
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At the other end of the vertebrate scale, hominoids have similarly provided the butt for many a joke, while Darwin himself has not escaped completely the humorists' pen or pencil.
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Oh, and I observed World Turtle Day by reading "Anatomy of Condorchelys antiqua Sterli, 2008, and the origin of the modern jaw closure mechanism in turtles" in the March Journal of Vertebrate Paleontology.
Insert [nothing witty] here.
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And while jawless vertebrates were present in the Cambrian, it was not until the Ordovician that armored fish became common enough to leave a rich fossil record.
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If preferred prey species are not present at these depths, lake trout may then resort to feeding on zooplankton and invertebrates.
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Most adult electric eels will feed on smaller fish, while juveniles will prey mainly on smaller invertebrates.
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The same kind of coelom-formation as in sagitta was afterwards found by Kowalevsky in brachiopods and other invertebrates, and in the lowest vertebrate -- the amphioxus.
The Evolution of Man — Volume 1
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In contrast to flies, which have a clearly segmented ectoderm, the mesoderm is the primary vertebrate tissue that is organized in a metameric pattern.
Nobel Lecture The Identification Of Genes Controlling Development In Flies And Fishes
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If so-called compsognathids – all of them relatively small, ecologically and morphologically generalized, long-limbed, long-tailed theropods that hunt small vertebrate prey – are not a clade but are actually scattered about the base of the coelurosaur family tree, this likely indicates that this ecotype was the ancestral one for coelurosaurs.
Archive 2006-06-01
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Li Shan supports warm temperate forest that is reported to provide habitat for several rare vertebrates including Chinese populations of rhesus macaque (Macaca mulatta), musk deer (Moschus berezovskii), giant salamander (Megalobatrachus davidiana), and Koklass pheasant (Pucrasia macrolopha).
Central China loess plateau mixed forests
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As is apparent from the brief review given above, the relationship between genome size and erythrocyte size is detectable in each of the vertebrate classes, even in the uniquely enucleate case of mammals.
A Dubious "Opportunity" for IDers
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The Sidmouth to Beer Coast SSSI supports the most westerly example of species-rich grassland in England and a diverse invertebrate fauna including the nationally scarce rufous grasshopper Gomphocerippus rufu.
Dorset and East Devon Coast, United Kingdom
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It was soon evident to every clear-headed thinker that this question could only be answered in the sense of our anthropogeny, by admitting that man had descended from a long series of Vertebrates by gradual modification and improvement.
The Evolution of Man — Volume 2
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Megascolides australis phylum Annelida is truly a giant among terrestrial invertebrates; according to this document lengths of adults average under 1 m.
Archive 2006-01-01
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Again, as Mr. Darwin says, "In the embryos of all air-breathing vertebrates, certain glands, called the corpora Wolffiana, correspond with and act like the kidneys of mature fishes;" and during the sixth month the whole body is covered very thickly with wool-like hair -- even the forehead and ears being closely coated; but it is, as Mr. Darwin observes, "a significant fact that the palms of the hands and the soles of the feet are quite naked, like the inferior surfaces of all four extremities in most of the lower animals," including monkeys.
The Scientific Evidences of Organic Evolution
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The shell is considered the most highly developed protective armor of any vertebrate species.
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Based on the clear clustering of the Wnt gene families it is highly unlikely that a single Wnt gene independently expanded in the cnidarian and vertebrate lineages.
Death of a popular anti-ID argument
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Insects, spiders, and other invertebrates make up most of the Hermit Warbler's diet.
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And while jawless vertebrates were present in the Cambrian, it was not until the Ordovician that armored fish became common enough to leave a rich fossil record.
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The color yellow in the animal world comes from pigments called carotenoids, which vertebrates cannot synthesize and must therefore obtain directly from their diets.
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In particular, there is a significant phylogenetic gap in information for the urochordates, a subphylum near the invertebrate-vertebrate transition.
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Curving appendages attached to oblong shapes or to punctured spheres in some of the works may allude to other life-forms such as insects or invertebrates.
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One of the best known examples in vertebrates is the cooperative breeding system of the pied kingfisher, where less related secondary helpers invest less in feeding hatchlings.
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The oldest true vertebrate fossils date back 530 million years.
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Shrikes use their hooked bills to break the necks of vertebrate prey.
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Surgeonfishes and parrotfishes remove coral polyps to get the algae or invertebrates that have bored into the coral skeleton.
Coral reef fish feeding behavior in the Caribbean
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Jack worked in many different areas of vertebrate paleontology during his long career, but he is best known for his pioneering research on the Tertiary mammals and biostratigraphy of west Texas and Mexico.
John A. Wilson, 1914 - 2008
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some invertebrates can regrow limbs or their tail after they lost it due to an injury
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In dry years, such as the year of this study, ponds were dry by mid-June, invertebrate and amphibian larvae were unable to develop enough to metamorphose and emerge from the water.
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Vertebrates and yet show no particular annelidan affinities?
Form and Function A Contribution to the History of Animal Morphology
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Populations of these invertebrates have been decimated or even eradicated in areas where wasps are common.
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Geneticists will be able to track the same set of genes across a variety of species - say, the genes for backbones in vertebrates.
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Corals, like the majority of marine invertebrates can also reproduce sexually by releasing eggs and sperm.
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Technically an invertebrate, amphioxus is classified in subphylum Protochordata, phylum Chordata.
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The history of the epibranchials presumably begins wherever vertebrates first developed a jointed, internal branchial arch rather than an unjointed, external branchial basket.
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Our results indicate that mesopelagic fish pose a stronger predatory threat than invertebrates to overwintering Calanus.
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Small quantities of copper are often fatal to invertebrates.
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He then told us that these first life-forms evolved into bacteria and then into the invertebrate animals, as well as plants.
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Let us review the fundamental features of the vertebrate body as context for notochords and backbones.
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The beluga sturgeon is one of the most long-lived of all vertebrate species.
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In spite of, or perhaps because of, the relative dearth of information on the vertebrate body axis, a groundswell of interest and activity is underway.
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We learned (more about) and actually tried our hand at scientific illustration, saw fossils and the prehistoric invertebrates that are believed to have been predators, and discussed with a fossil comparer how her degree in art led (or didn't) to her career at the Field.
Archive 2006-03-01
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In short, the vertebrate eye is a masterpiece not of design, but of jury-rigged compensations for a fundamentally defective architecture.
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This junction is clearly visible as a dark band or basal lamina in electron micrographs of developing vertebrate teeth.
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River bed invertebrates support a diverse birdlife including wrybill Anarhynchus frontalis, paradise shelduck Tadorna variegata, black-billed gull, black-fronted tern Sterna albistriata and banded dotterel Pluvialis obscura.
Te Wahipounamu (South-West New Zealand World Heritage Area), New Zealand
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Considering that many other species of vertebrates also depend on fish for food, this close relationship between the ichthyofauna and the mangroves is crucial to the maintenance of diversity in these communities.
Petenes mangroves
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Marine vertebrates including tunas, seabirds, sharks, sea turtles, pinnipeds and cetaceans use a pelagic ecosystem we barely understand.
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During the four following months it goes in and out, and strolls about between meals, like other young ones of its class, and is then an animal at nurse affording thus a twofold example of the tendency of the great Creator to repeat Himself in His conceptions, here using for the infancy of the mammal the system invented for adult insects -- elsewhere repeating the butterfly in the humming-bird, who may fairly be called a vertebrated butterfly, and reproducing the gnat in the vampire-bat, which I look upon as an enlarged and perfected revise of the original pattern, whence comes the scourge of our sweet summer nights.
The History of a Mouthful of Bread And its effect on the organization of men and animals
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In bony vertebrates, endochondral bones form from centers of ossification in the chondrocranium, although much of the braincase often remains cartilage.
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The axolotl is the champion of vertebrate regeneration, with the ability to replace whole limbs and even parts of its central nervous system," Scott said.
THE MEDICAL NEWS
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He was not a pseudoscientist or a quack, but was the great figure of invertebrate biology he coined the word “invertebrate”
The Panda's Thumb: Guest Contributor Archives
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In going from amphioxus to jawless fish to jawed fish to land vertebrates we see an increase in complexity of the clotting cascade:
Behe's Test
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Amphibians are regarded as sentinel vertebrates in the current drama of global extinctions.
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Lamarck had already recognised that the descent of man from a series of other Vertebrates -- that is, from a series of Ape-like Primates -- was essentially involved in the general theory of transformation which he had erected on a broad inductive basis; and he had sufficient penetration to detect the agencies that had been at work in the evolution of the erect bimanous man from the arboreal and quadrumanous ape.
Evolution in Modern Thought
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The other type of skeleton is the endoskeleton, which provides a solid frame to carry the soft tissues of all vertebrates, including humans.
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Experimental psychologists have demonstrated that a wide range of warm-blooded vertebrates, from parrots to bonobos, evince surprising antecedents of human linguistic capacities.
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In at least some areas of the river, Axarus larvae are eaten by vertebrate predators.
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One genus is predatory, trapping small invertebrates under the fringe of the mantle, and then eating the captured prey.
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Alternatively, competent larvae of many sessile invertebrate species do not progress toward metamorphosis if stimulatory cues are absent.
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Frugivorous vertebrates ingest fruits and the seeds within, later defecating the seeds.
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New mutated forms of GFP that are more intensely fluorescent provide more avenues for its use in vertebrate systems.
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Copepods feed on microscopic algae and in turn serve as food for millions of other invertebrates and fish.
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The drawing below, showing the branches of the columellar muscle of Helix pomatia, is from the last volume of Libbie Hyman's incomplete series The Invertebrates, published in 1967 shortly before she died.
Tangled innards of a snail or how we know the intelligent designer was a klutz
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These agents might be arthropod-transmitted viruses, water contaminated with enteric bacteria, or helminths whose infective eggs and larvae are found in soil and invertebrate hosts.
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The circulatory systems of other vertebrates, as well as those of squids and octopuses, employ similar rubbery materials.
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Anhydrobiosis is a state of suspended animation certain invertebrate animals enter in response to severe drought.
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Vertebrate animals (mammals, birds, theropod dinosaurs) develop larger brains then their earlier reptilian ancestors.
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If this is your first marine tank, I would not consider sensitive butterfly fish, or coral invertebrates.
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The coming availability of multiple invertebrate chordate genomes Broad has completed another Ciona species and JGI has sequenced the lancelet will doubtless catalyze the discovery of more interesting changes that led to “vertebrate” features.
Insight Into Eye Evolution Deals Blow To Intelligent Design - The Panda's Thumb
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Anhydrobiosis is a state of suspended animation certain invertebrate animals enter in response to severe drought.
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The upper or back-bay invertebrate fauna is dominated by infaunal species that brood their young.
Elkhorn Slough National Estuarine Research Reserve, California
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The two hemispheres of the vertebrate brain have also become specialised.
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Direct zoonoses are transmitted from an infected vertebrate host to another host by direct contact, fomite or mechanical vector.
Zoonotic diseases
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Ichthyosaurs were not dinosaurs, but represent a separate group of marine vertebrates.
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Melatonin and serotonin are indoleamines derived from tryptophan which are produced by the pineal gland in vertebrates.
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This interest in marine invertebrates was to be a life long obsession, climaxing in his massive four-volume contribution to the comparative anatomy and systematics of fossil and living Cirripedia or ‘barnacles’.
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Included among the invertebrates are moth flies, wood gnats, midges, punkies, mosquitoes, marsh beetles, and beelike or wasplike syrphid flies.
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The papers cover a substantial range of physiological systems and numerous types of organisms, including ectotherms and endotherms, vertebrates, insects, plants, and bacteria.
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For example, the first gill arch in jawless fishes like lampreys (and in embryos of jawed vertebrates) corresponds to the jaws in those vertebrates that have them (that is, all modern vertebrates except lampreys and hagfishes).
THE GREATEST SHOW ON EARTH
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These are miniature jaw-like structures that come from a free-swimming worm-like animal, actually more closely related to fishes than to any of the other invertebrates.
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Furthermore, there appears to be a total absence of dentine, which is unexpected if conodonts are vertebrates.
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Other than the ‘eyes’ of the Crawling Eye model, the conodont is revealed to be a very ordinary sort of vertebrate.
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Most larvae are predaceous and feed on most other small invertebrates.
Insecta (Aquatic)
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In contrast, people and other jawed vertebrates brandish adaptive immune systems.
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Other invertebrates survive dry periods by remaining in the pond substrate as eggs, pupae, or aestivating adults.
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Furthermore, fruits in the temperate zone are typically removed by frugivorous vertebrates before they become damaged or show signs of rot.
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Without functional analyses of axial ligaments, the basis for flexural stiffness in any particular vertebrate axis is wanting.
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These zooxanthellae may be found in many marine invertebrates, including sponges, corals, jellyfish, and flatworms, as well as within protists, such as ciliates, foraminiferans, and colonial radiolarians.
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Thirteen standard, plastic pitfall traps, with soapy solution in the bottom cup, were maintained throughout the stay to sample invertebrates.
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Small rudd can often be seen patrolling in huge shoals picking off any invertebrates in the water column.
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But some land vertebrates have lost some or all of their ability to detect pheromones.
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Modern vertebrates are classified into two major groups, the gnathostomes (jawed vertebrates) and the agnathans (jawless vertebrates).
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The section contains about 44,000 reprints and books and currently holds the most important periodicals of mammalogy and vertebrate palaeontology.
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However, because of the great variety of microorganisms present in fruit, the associated effects on the interactions between vertebrate frugivores and fruiting plants may also be highly variable.
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Sure enough, lampreys are simple vertebrates lacking jaws, teeth and a bony skeleton, whereas sharks are much more complex animals.
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The history of the epibranchials presumably begins wherever vertebrates first developed a jointed, internal branchial arch rather than an unjointed, external branchial basket.
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In vertebrates, the limb apical epidermis promotes proliferation and inhibits differentiation of underlying mesenchymal cells.
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Also smaller vertebrate herbivores, such as rodents, are commonly negatively affected by endophyte ingestion.
PLoS ONE Alerts: New Articles
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If we are ever to develop a theory of vertebrate osteology, this is one of the most remarkable facts it will have to explain.
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When the Army software, owned by DHS, was turned on the bee remains, it detected not only the fungus, but also a virus known as the invertebrate iridescent virus (IIV).
TIME.com: Top Stories
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Finally, a variety of invertebrates secrete viscid secretions as part of a reported ‘duo-gland’ adhesion.
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Mechanisms of inbreeding avoidance are well documented in vertebrate societies.
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Their stomachs are the most acidic recorded for any vertebrate, allowing them to digest even the bones and shells of prey animals.
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Frugivorous vertebrates ingest fruits and the seeds within, later defecating the seeds.
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Between 1859 and 1866, he worked on many "invertebrate" groups, including radiolarians, poriferans (sponges) and annelids (segmented worms).
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To delve further into this subject, check out our new exhibits on vertebrate flight and chiropteran flight.
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If this is your first marine tank, I would not consider sensitive butterfly fish, or coral invertebrates.
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The key to the transformation is that the oxygen has increased the number of invertebrate the fish feed on from about five to 30 including freshwater shrimp, water louse and a caddis which only thrives in pristine waters.
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The invertebrate fauna includes many planktonic forms, particularly jellyfish and the stemless crinoid Saccoma, and also nektonic organisms such as cephalopods.
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In eggs with yolk, whether vertebrate or annulate, there is always a separation into an animal and a plastic layer.
Form and Function A Contribution to the History of Animal Morphology
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Why, then, do all land vertebrates have pentadactyl limbs, for example?
Dembski versus Europe - The Panda's Thumb
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The key to the transformation is that the oxygen has increased the number of invertebrate the fish feed on from about five to 30 including freshwater shrimp, water louse and a caddis which only thrives in pristine waters.
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Even in the case of microbial antigens not found in vertebrates such as lipopolysaccharides, it should be noted that peptide epitopes can mimic bacterial carbohydrates and DNA.
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The Ordovician is best known for the presence of its diverse marine invertebrates, including graptolites, trilobites, brachiopods, and the conodonts (early vertebrates).
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The first tetrapods, or land-living vertebrates, appeared during the Devonian, as did the first terrestrial arthropods, including wingless insects and the earliest arachnids.
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This is an artificial distinction and reflects our anthropocentric viewpoint; however, in the past the invertebrates were regarded as a formal taxonomic group of high rank.
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At least for some of these, a direct role downstream of vertebrate Hh proteins has been defined similar to what is seen in flies.
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Preliminary results show that molas, unlike other large marine vertebrates, are mostly home bodies and unlikely to make large-scale migrations.
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At this time he considered _Balanoglossus_ -- by reason of its gill-slits (its notochord he did not know) -- to be the nearest living representative of the ancestral form of Vertebrates and Annelida.
Form and Function A Contribution to the History of Animal Morphology
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Whether the embryo is a ball of cells or a mass on top of a yolk, though, all vertebrates carry out equivalent movements during gastrulation; again, the differences are superficial, depending on whether the cluster of cells is balled up or flattened.
A bit more on Haeckel - The Panda's Thumb
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Furthermore, there appears to be a total absence of dentine, which is unexpected if conodonts are vertebrates.
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But ‘partial’ eyes turn out to be common in nature, and biologists can trace eye evolution from the lensless flatworm eyespot to the complex geometry of vertebrate eyes.
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Scavenging crabs clean the bones, as do the smaller invertebrates such as the tiny springtails that live in the sand.
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A large brain relative to body size is an almost universal foetal characteristic of vertebrates, and certainly of mammals.
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Invertebrates are essential elements of every ecosystem - hey fill niches as herbivores, carnivores, parasites, and decomposers.
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In many cases, the adhesive gels secreted by invertebrates are described as mucus.
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In humans, and all other vertebrates, the chemical signals are produced by specialised brain centres such as the hypothalamus and secreted into the blood stream that distributes them around the body.
2007 June - Telic Thoughts
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In addition to abundant crinoids, a diverse invertebrate and vertebrate fauna is contained within the Muldraugh.
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Otters mostly feed on invertebrates such as urchins, squid, octopus, crabs, abalone and other mollusks.
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The senior students were keen to observe the invertebrate marine animals, such as starfish, urchins and crustaceans.
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One of the most prominent characteristics of early vertebrates is the elongate caudal fin bearing fin rays.
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Among vertebrates, newts and other urodele amphibians show a remarkable capacity for regeneration.
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The semi-arid lowlands around the head of the Gulf of Carpentaria form a notable disjunction in the distribution of many vertebrate groups in northern Australia.
Carpentaria tropical savanna
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There he found invertebrates such as trilobites, bryozoa, and brachiopods - fossil remains that serve as a window on deep time.
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Invertebrates have rhabodomeric cells that use a special version of the photopigment called r-opsin, and activate cells by a particular pathway called a phospholipase-C cascade.
PZ Myers - The Deepest Links (on Evolution)
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These 'diverticular' eyes are unique among all vertebrates in that they use a mirror to make the image.
Military Space News, Nuclear Weapons, Missile Defense
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In terrestrial vertebrates, otoconia are found in three inner-ear sensors, the saccule, the utricle, and the lagena.
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Fish Gill Filaments - Unlike land vertebrates or marine mammals, fish don't have lungs, but they do have paired respiratory structures called gills, or branchia.
Undefined
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Some invertebrates also have both, but they use the rhabdomeric receptors for vision and the ciliary receptors for circadian rhythms.
PZ Myers - The Deepest Links (on Evolution)
