During embryonic development the mouth is formed at some distance anterior to the blastopore and the blastopore forms the anus in:
Correct answer: A. Echinoderms
- A. Echinoderms
- B. Mollusca
- C. Nematoda
- D. Aschelminthes
Explanation
A. When blastopore develops into anus then these animals are called deuterostomates. Echinoderms and chordates are deuterostomates. B. Molluscs are protostomates , in them blastopore develops into mouth . C. Nematods are pseudocoelomates therefore they are not grouped into protostomes and deuterostomes. D. These are also pseudocoelomates.
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