Which statement correctly outlines the reason for divergent evolution hypothesis of echinoderms and hemichordates?
Correct answer: A. Blastopore forms the anus
- A. Blastopore forms the anus
- B. They are both aquatic
- C. They have a well developed circulatory system
- D. They have dorsal nerve cord
Explanation
Both hemichordates and echinoderms are deuterostomes, i.e. blastopore develops to form the anus. This shows that both groups evolved from a single common ancestor (divergent evolution).
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About Kingdom Animalia
Animals are multicellular, heterotrophic eukaryotes whose cells lack cell walls and chloroplasts, with specialised tissues in most groups. Coverage includes body symmetry, tissue layers, coelom, segmentation and levels of organisation, plus major phyla such as Porifera, Cnidaria, Platyhelminthes, Annelida, Arthropoda, Mollusca and Chordata.
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