SCIENCE
ZOOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Annelida
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Arthropoda
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Cnidara
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Echindermata
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Detailed explanation-1: -The body segmentation first appeared in the phylum, Annelida (annulus meaning little ring).
Detailed explanation-2: -The body segmentation first appeared in the phylum Annelida. They demonstrate the division of the body into a linear series of cylindrical segments from head to tail. So, the correct answer is option C.
Detailed explanation-3: -Annelida segmentation is metameric, meaning their bodies are externally divided into similar segments by annuli. These segments are also divided internally by interior walls called septa .
Detailed explanation-4: -Annelids show metameric segmentation.
Detailed explanation-5: -The annelids include earthworms, polychaete worms, and leeches. All members of the group are to some extent segmented, in other words, made up of segments that are formed by subdivisions that partially transect the body cavity. Segmentation is also called metamerism.