Animal Kingdom
Which of the following features is not present in the Phylum-Arthropoda?
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Subjective Type
Segmentation in the body is first observed in which of the following: (a) Platyhelminthes (b) Aschelminthes (c) Annelida (d) Arthropoda
Solution
The body segmentation first appeared in the phylum, Annelida (annulus meaning little ring). The fundamental characteristic of the phylum, Annelida, is the division of the body into a linear series of cylindrical segments, or metameres. Each metamere consists of a section of the body wall and a compartment of the body cavity with its internal organs.
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