Which of the following animals is not a protostome?
Correct answer: C. Stingray
- A. Cockroach
- B. Butterfly
- C. Stingray
- D. Earthworm
Explanation
Stingrays are cartilaginous fish and belong to the phylum Chordata. Chordates are deuterostomes, which means they have a mouth that develops from the second opening (the blastopore becomes the anus) during embryonic development. This makes them different from protostomes like insects.
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