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Class Amphibia

In molluscs, ...

Question

In molluscs, the general body cavity is

A

Blastocoel

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B

Hydrocoel

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C

Haemocoel

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D

Pseudocoel

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Solution

The correct option is A Haemocoel
C. Haemocoel
EXPLANATION: The main body cavity of mollusks is a haemocoel, through which blood circulates. The mollusks are triploblastic organisms with true coelom.The circulatory system of mollusks is open.

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(i) True coelom is a body cavity which arises as a cavity in the embryonic mesoderm.
(ii) Digestive cavity is found in acoelomates, pseudocoelomates as well as coelomates.
(iii) The body cavity of arthropods and non-cephalopod molluscs is called haemocoel.
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