flatworm

How To Use flatworm In A Sentence

• Among the earliest hunters, flatworms were simple but effective killing machines.
• In the context of this thread, the homeobox regulatory mechanism of non-metameric ancestral metazoans (such as flatworms) would qualify as an exaptation for the homeobox regulatory mechanism of their metameric descendants. Ancient Predator Revealed!
• Flatworms are unsegmented, bilaterally symmetrical worms that lack a coelom but that do have three germ layers.
• This marine worm, first described in 1949 as an acoel flatworm and later claimed as either an early metazoan offshoot or a primitive deuterostome, has recently been affiliated with primitive bivalve molluscs, based upon a study of gamete development oogenesis and an analysis of sequence data from both 18S rRNA and mitochondrial genes. Strange worm, Xenoturbella - The Panda's Thumb
• The planarians used in these studies, also called flatworms, live in fresh water and have a singular ability to regenerate.
• 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.
• The focal stage for this analysis is the early period of embryo encapsulation, a mode of development that has evolved several times among gastropods, polychaetes, nemerteans and flatworms.
• In some flatworms, the process of cephalization has included the development in the head region of light-sensitive organs called ocelli.
• The organization of the body compartment between the epidermis and gut in nemerteans and flatworms also does not reveal a uniquely similar pattern.
• To test the function of Hox genes in anteroposterior axis specification in flatworms, single, double and triple injections of dsRNA of Dthox-D and C and GtAbdBb in intact and regenerating planarians are presently being studied.