How To Use Angiosperm In A Sentence
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Its predominant life features are the culmination and the beginning of the decline of reptiles, amphibians, cephalopod mollusks, and cycads, and the advent of marsupial mammals, birds, teleost fishes, and angiospermous plants.
The Elements of Geology
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Angiosperm root hemiparasites attach to the root system of a host plant and extract xylem sap after gaining contact with xylem vessels.
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The following list gives a rough overview of their distribution: tropical America: 250 to 270 genera tropical Asia: 260 to 300 genera tropical Africa: 230 to 270 genera Oceania: 50 to 70 genera Europe and temperate Asia: 40 to Orchidaceae is the largest family of the flowering plants (Angiospermae).
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Simple trichomes are present on aerial surfaces of most angiosperms and on some gymnosperms and bryophytes.
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Flora of Japan, Vol. IIb: Angiospermae; Dicotyledonieae; Archichlamideae (b).
Biological diversity in Japan
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Nitrogen fixation by actinomycete-nodulated angiosperms.
Chapter 13
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The angiosperm female gametophyte, called the embryo sac, consists of four cell types: synergid, antipodal, egg, and central cell.
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Many modern basal angiosperms grow on erosional substrates that are unlikely to be preserved in the sedimentological record.
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Populations of marine angiosperms, or seagrasses, are at the basis of productive ecosystems thriving in shallow coastal areas around the world.
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Here we combine phylogenetic reconstruction with new data on the morphology and ecophysiology of these plants to infer early angiosperm function.
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In a number of angiosperm species, mostly dicots, the endosperm is a transient structure that may be absorbed in the later stages of seed development.
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In this paper, recent work on fruit type evolution in angiosperms is reviewed in relation to dispersal agents and habitat ecology.
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Bass suggested that the fossils might represent fructifications of angiosperms or gymnosperms, or perhaps both, but said formal identifications had not been made.
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So many products can be made from hemp it could stock its own department store, if only it was an enterprising human being instead of a fairly unambitious angiosperm.
Ned Goldreyer: All the Rich Flavor With None of That Annoying Euphoria
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There are 794 angiosperm genera, 77% of China's total angiosperm species, 24 gymnosperm, 70 pteridophyte and 102 bryophyte genera.
The Sichuan Giant Panda Sanctuaries, China
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From there, other authors suggested that angiosperms moved into disturbed streamside habitats in mesic environments.
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The greatest changes in albedo are likely to occur after increases in area relative to tundra vegetation of the following vegetation types (in decreasing order of effect): dark, evergreen boreal trees such as pine and spruce, deciduous conifer trees such as larch, deciduous angiosperm trees such as birch, and low shrubs such as willows and dwarf birch.
Effects of climate change on landscape and regional processes and feedbacks to the climate system in the Arctic
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The scattered angiosperms here and in the foothills supported some host-specific herbivores with associated predators; they were also exploited (especially after exceptional rains) by a number of Orthoptera, Hemiptera, and Lepidoptera derived from migratory African populations and perhaps reinforced at intervals by additional groups of colonists.
Ascension scrub and grasslands
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From that time onwards, so long as these Gymnosperms were, as was usual, reckoned as dicotyledonous flowering plants, the term Angiosperm was used antithetically by botanical writers, but with varying limitation, as a group-name for other dicotyledonous plants.
Encyclopaedia Britannica, 11th Edition, Volume 2, Part 1, Slice 1
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Early gymnosperms and angiosperms were wind-pollinated.
False Fear? - The Panda's Thumb
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Orchids display a vast array of floral morphologies and pollination mechanisms, unparalleled in any other angiosperm family.
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Members of the family are unusual aquatic angiosperms growing on rocks in rapids and waterfalls in the world's tropics and subtropics.
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According to the Angiosperm Phylogeny Group (APG), the Brazil nut family belongs to the order Ericales which is basal to the euasterid clade.
Brazil nut family (Lecythidaceae) in the New World
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Ripening involves production of a number of fruit volatiles, but ethanol is perhaps the only olfactory commonality to an otherwise bewildering taxonomic array of angiosperm fruits.
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An antinomy if the verminations may reenlist to construct stratigraphical angiospermatous.
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Pistia stratiotes L. is a free-floating aquatic angiosperm that can reproduce rapidly by vegetative offshoots from stolons.
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Double arrows mark epidermal adaxial surface at site of angiospermy.
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In angiosperms, trichomes may occur on leaves, petals, stems, petioles, peduncles and seed coats, depending on the species.
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Flora of Japan, Vol. IIIb: Angiospermae, Dicotyledoneae, Sympetalae (b).
Biological diversity in Japan
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The inferred chromosome numbers of these extinct species suggest that seven to nine is the primitive haploid chromosome number of angiosperms and that most angiosperms approximately 70 percent have polyploidy in their history.
Junk DNA is still junk - The Panda's Thumb
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The root of angiosperm phylogeny inferred from duplicate phytochrome genes.
Biological diversity in New Caledonia
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Copia group sequences have been found in diverse species, including single-cell algae, bryophytes, gymnosperms, and angiosperms.
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Gynodioecy, the coexistence of hermaphrodite and female (male sterile) individuals in natural populations, is relatively frequent in angiosperm species.
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Hence, we remain agnostic regarding phylogenetic relationships among basal angiosperm lineages.
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Moreover, since the expression pattern is similar in a gymnosperm and in an angiosperm this function appears to be evolutionarily conserved.
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The findings of this study revealed for the first time in angiosperm cells that plasmolysis triggers an extensive reorganization of the AF cytoskeleton, which is involved in the regulation of protoplast shape and volume.
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The evolution of nectaries in late Cretaceous flowers signals the beginning of the mutualism between hymenopterans and angiosperms.
Pollination
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The earliest angiosperms: Evidence from mitochondrial, plastid, and nuclear genomes.
Biological diversity in New Caledonia
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Both species occured on rotten angiosperm wood, and caused a white rot.
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Angiosperm seeds are comprised of an embryo and endosperm resulting from double fertilization of the egg cell and two polar nuclei, respectively.
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For comparison, monophyly of angiosperms and spermatophytes is supported by 532 and 631 positions, respectively.
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This latter use of the Hebrew word ets refers to an angiosperm—a tree with fruit and seed—not a fern or a grass.
The Source
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Like other seed plants, angiosperms are heterosporangiate, producing pollen and ovules in different organs.
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Lastly, archegonia are always absent in angiosperms.
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Moreover, these species are of considerable importance, not only because they may be a key to early angiosperm radiation, but also because several species may provide basic elements in understanding evolution in certain groups.
Juan Fernández Islands temperate forests
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The supposed “mystery” here is that a 1993 paper by Labandeira and Sepkoski showed that “by the middle Jurassic the earliest commonly accepted date for the origin of Angiosperms 65% (low estimate) to 88% (high estimate) of all modern insect mouthpart classes were present”.
Behe and bugs: Genesis of a Creationist canard? - The Panda's Thumb
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These totals incorporate both terrestrial and aquatic angiosperms, together with gymnosperms, including the enigmatic gnetophyte Welwitschia mirabilis.
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On one hand, angiosperm cells lack centrosomes as microtubule organizing centres and are missing the contractile ring which serves as a tool for cytokinesis in animal cells.
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The inferred chromosome numbers of these extinct species suggest that seven to nine is the primitive haploid chromosome number of angiosperms and that most angiosperms approximately 70 percent have polyploidy in their history.
Junk DNA is still junk - The Panda's Thumb
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Pollination in angiosperms and gymnosperms is the process that transfers pollen grains, which contain the male gametes (sperm) to where the female gamete (s) are contained within the carpel; [1] in gymnosperms the pollen is directly applied to the ovule itself.
Pollination
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Potential foods included not only pollinating insects of angiosperm flowers but also the pollens, nectars, fruits, seeds and foliage of angiosperms themselves.
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With a number of methods a topology in which the grasses clade is basal within the angiosperm group was found with high bootstrap support.
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Spherical, dark green Vaucheria propagules, presumably oospores, were observed among the far more common diatoms, nematodes, angiosperm vessel members, and sand fragments in the slurry.
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But you are wrong in your theory of the development of the Angiospermae from Cycadeoidea dacotensis.
The Moon Pool
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High southern latitudes were not invaded by angiosperms until the end of the Cretaceous.
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Graniferous tracheary elements, which may be either tracheids or vessel members, have been observed most often in the haustoria of root-parasitic angiosperms.
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Simple trichomes are present on aerial surfaces of most angiosperms and on some gymnosperms and bryophytes.
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Endemism is particularly high in 33 angiosperm and six gymnosperm, and fern families, most of which are ancient or primitive with restricted relict distributions.
Queensland tropical rain forests
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Today's terrestrial habitats are dominated by the angiosperms - flowering plants, one of whose key features is the possession of fruits of a wide range of forms and types.
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The advent in 1851 of Hofmeister's brilliant discovery of the changes proceeding in the embryo-sac of flowering plants, and his determination of the correct relationships of these with the Cryptogamia, fixed the true position of Gymnosperms as a class distinct from Dicotyledons, and the term Angiosperm then gradually came to be accepted as the suitable designation for the whole of the flowering plants other than
Encyclopaedia Britannica, 11th Edition, Volume 2, Part 1, Slice 1
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Abstract: Three published estimates of the frequency of polyploidy in angiosperms 30 to 35 percent, 47 percent, and 70 to 80 percent were tested by estimating the genome size of extinct woody angiosperms with the use of fossil guard cell size as a proxy for cellular DNA content.
Junk DNA is still junk - The Panda's Thumb
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The colleter, an epidermal secretory structure, can be found mainly on the adaxial side of stipules and/or sepals among 60 families of the angiosperms.
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This is a diverse community of ferns, sedges, grasses, angiosperms and mosses and is dominated by B. palmiforme, crowberry Empetrum rumbrum, grasses and sedges.
Gough Island Wildlife Reserve, United Kingdom
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Taxonomists can now say that the ferns' closest cousins are the seed plants - angiosperms (flowering plants) and gymnosperms (such as conifers).
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Early angiosperm fruits were apocarpous, with several free carpels.
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Angiosperms are usually tiny, growing in isolated clusters and nowhere forming the bulk of the cover.
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But angiosperm life forms and niches are so varied, with much of their organismic machinery being cells where size matters, that a vast spectrum of cell-size has been favoured by selection.
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The experimental content is "Morphology and Physiology of Angiospermae" , which is in the textbook of biology for the secondary normal school, published by people's education press.
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There are 794 angiosperm genera, 77% of China's total angiosperm species, 24 gymnosperm, 70 pteridophyte and 102 bryophyte genera.
The Sichuan Giant Panda Sanctuaries, China
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A great variation in endosperm size is observed within angiosperms.
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Orchidaceae is the largest family of the flowering plants (Angiospermae).
WN.com - Articles related to '10 most wanted' plants inspected for clues to climate change
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The angiosperms range from small leaves with chloranthoid teeth to larger leaves of the Ficophyllum type.
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Angiosperms are usually tiny, growing in isolated clusters and nowhere forming the bulk of the cover.
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Extant vascular plants range from clubmosses and ferns and their allies (such as whisk ferns and horsetails) to complex seed plants, comprising gymnosperms and angiosperms.
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Simple trichomes are present on aerial surfaces of most angiosperms and on some gymnosperms and bryophytes.
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Simple trichomes are present on aerial surfaces of most angiosperms and on some gymnosperms and bryophytes.
-
The scattered angiosperms here and in the foothills supported some host-specific herbivores with associated predators; they were also exploited (especially after exceptional rains) by a number of Orthoptera, Hemiptera, and Lepidoptera derived from migratory African populations and perhaps reinforced at intervals by additional groups of colonists.
Ascension scrub and grasslands
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Some angiosperms reproduce by apomixis, a natural way of cloning through seeds.
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Angiospermae by Paul Hermann in 1690, as the name of that one of his primary divisions of the plant kingdom, which included flowering plants possessing seeds enclosed in capsules, in contradistinction to his Gymnospermae, or flowering plants with achenial or schizo-carpic fruits -- the whole fruit or each of its pieces being here regarded as
Encyclopaedia Britannica, 11th Edition, Volume 2, Part 1, Slice 1
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These data suggest that the enzyme is well conserved in plants and could play similar physiological roles in angiosperms and gymnosperms.
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Note here: what was present before Angiosperms was the basic conformation of the mouthpart classes, not the actual highly adapted, specialized apparatuses that are often currently found in existing species.
Behe and bugs: Genesis of a Creationist canard? - The Panda's Thumb
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Were the first angiosperms woody trees and shrubs, or were they small herbs?
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The main angiosperm trees include Montrouziera cauliflora, Calophyllum neocaledonicum, Dysoxylum spp.,
New Caledonia rain forests
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One copy of this gene occurs in angiosperms, but two copies occur in the other four seed plant groups.
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There are 794 angiosperm genera, 77% of China's total angiosperm species, 24 gymnosperm, 70 pteridophyte and 102 bryophyte genera.
The Sichuan Giant Panda Sanctuaries, China
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The majority of the angiosperm species have very small or small flowers.
Juan Fernández Islands temperate forests
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Flora of Japan, Vol. IIIa: Angiospermae, Dicotyledoneae, Sympetalae (a).
Biological diversity in Japan
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The hemiparasitic angiosperm Bartsia alpina has the potential to accelerate decomposition in sub-Arctic communities.
General characteristics of arctic species and their adaptations in the context of changes in climate and ultraviolet-B radiation levels
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Over 100 Gondwanan species are found on the Cape York Peninsula, including members of the primitive angiosperm families Annonaceae and Lauraceae, as well as orchids of the Arthochilus, Corybas, and Calochilus genera, and members of the Araucariaceae and Podocarpaceae families.
Cape York tropical savanna
