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Which among the following is incorrect about Mollusca?

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in Biology – Class 11 by (272k points)
Which among the following is incorrect about Mollusca?

(a) This is the second largest phylum of Animal Kingdom

(b) They have organ system level of organization

(c) They have a dorsal heart along with dorsal and ventral blood vessels

(d) Their body is covered with calcareous shell

I had been asked this question by my college director while I was bunking the class.

Enquiry is from Classification of Animal Kingdom into Different Phylum-4 in chapter Animal Kingdom of Biology – Class 11

1 Answer

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Correct choice is (c) They have a dorsal heart along with dorsal and ventral blood vessels

Explanation: Mollusks constitute the second largest phylum of Animal kingdom. They have organ system level of organization. They have open type of circulatory system. Their body is covered with calcareous shell.

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