Assertion (A): Cnidarians have a gastrovascular cavity that serves both digestive and circulatory functions. Reason (R): Cnidaria…

Question

Assertion (A): Cnidarians have a gastrovascular cavity that serves both digestive and circulatory functions.

Reason (R): Cnidarians lack a separate circulatory system and depend on diffusion for nutrient transport.

1. A. Both A and R are true, and R correctly explains A. (Correct answer)
2. B. Both A and R are true, but R does not explain A.
3. C. A is true, but R is false.
4. D. A is false, but R is true.

Correct Answer

Option A — Both A and R are true, and R correctly explains A.

Detailed Solution & Explanation

The correct answer is Both A and R are true, and R correctly explains A..

Key Points

• Cnidarians do have a gastrovascular cavity serving both functions (A is true).
• They lack a separate circulatory system (R is true), and this is exactly WHY the gastrovascular cavity serves dual function - R correctly explains A.