Question:
Molluscs with closed type of blood circulatory system are included in the class
Molluscs with closed type of blood circulatory system are included in the class
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Circulatory system in Mollusca:
\[
\boxed{
\begin{aligned}
&\text{Cephalopoda} &&\rightarrow \text{Closed circulation}
&\text{All other classes} &&\rightarrow \text{Open circulation}
\end{aligned}
}
\]
Updated On: Jul 15, 2026
- Scaphopoda
- Gastropoda
- Pelecypoda
- Cephalopoda
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The Correct Option is D
Solution and Explanation
Step 1: Recall the circulatory system in molluscs.
Most molluscs possess an open circulatory system.
The only exception is
\[
\boxed{\text{Class Cephalopoda}}
\]
which has a well-developed closed circulatory system.
Step 2: Choose the correct option. Therefore, \[ \boxed{(D)} \] is the correct answer.
Step 2: Choose the correct option. Therefore, \[ \boxed{(D)} \] is the correct answer.
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