WebIn biology, a tagma (Greek: τάγμα, plural tagmata – τάγματα - body of soldiers; battalion) is a specialized grouping of multiple segments or metameres into a coherently functional … WebSep 23, 2024 · The phylum Annelida includes worm-like, segmented animals. Segmentation is both external and internal, which is called metamerism. Annelids are protostomes. The presence of chitinous hairs …

Segmentation (biology) - Wikipedia

WebJul 16, 2010 · Segmentation, the repetition of identical anatomical units, seems to be the secret behind the diversity and longevity of the largest and most common animal groups … Segmentation in animals typically falls into three types, characteristic of different arthropods, vertebrates, and annelids. Arthropods such as the fruit fly form segments from a field of equivalent cells based on transcription factor gradients. Vertebrates like the zebrafish use oscillating gene expression to define segments known as somites. Annelids such as the leech use smaller blast cells budded … mass gov plumbing license

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WebSep 4, 2024 · Segmented animals might be able to evolve more or fewer segments without fatally disrupting their biology. So, he reasons, once a single group of segmented animals evolved, ... WebJul 8, 2024 · What is a segmented animal? Segmented animals are those considered to have organs that were repeated, or to have a body composed of self-similar units, but usually it is the parts of an organism that are referred to as being segmented. Which animal has no segmentation? Nematoda. WebUsually, sets of segments are grouped into a larger unit, such as the abdomen. Try it out! Which of these animals are segmented? Segmentation is a complicated topic. Both the onychophoran and mouse show some segmentation as they develop. The onychophoran also has repeated organs that correspond to internal segmentation. mass gov nursing renewal