Biology
Among protostomes, which morphological trait has shown the most variation?
A. Type of symmetry (bilateral vs. radial vs. none)
B. Type of body cavity (coelom vs. Pseudocoelom vs. acoelom)
C. Number of embryonic tissue types (diploblastic vs. triploblastic)
D. Cephalization (head vs. no head)
I think it is B but can someone please confirm it for me???
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Answers
Yes, it is B. Type of body cavity (coelom vs. Pseudocoelom vs. acoelom) has shown the most variation among protostomes. This is due to the fact that different types of body cavities developed in different groups of protostomes as a result of evolutionary adaptations and developments that occurred over time. A coelom is a fluid-filled cavity formed from mesoderm tissue, whereas a pseudocoelom is a false coelom formed by the fusion of the endoderm and mesoderm layers and an acoelom is a body cavity that is missing altogether. Different groups of protostomes have evolved various structures to occupy different body cavity structures.
