Question

Assertion (A): Circulatory system of arthropods and molluscs is mainly open type. 
Reason (R): Blood pumped out by the heart is circulated through a series of blood vessels in them.

• A. Both A and R are true. R is the correct explanation for A
• B. Both A and R are true. But R is not the correct explanation for A
• C. A is true. But R is false
• D. A is incorrect but R is true

Hint:

Understanding the difference between open and closed circulatory systems is crucial in comparative anatomy and physiology.

Answer 1

The Correct Option is C

Evaluating the circulatory system features. The assertion is correct; both arthropods and most molluscs have an open circulatory system where blood is not entirely contained within vessels but bathes the organs directly. However, the reason is incorrect because in an open circulatory system, blood flows freely into the body cavity and is not circulated through a series of closed blood vessels.