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Assertion: The first step of gas exchang...

Assertion: The first step of gas exchange occurs through body surface in some animals.
Reason: Body surface or membrane of amphibia is thick in nature.

A

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

B

If both Assertion and Reason are true ,but the Reason is not the correct explanation of the Assertion.

C

If Assertion is true, but Reason is false

D

If both Assertion and Reason are false.

Text Solution

AI Generated Solution

The correct Answer is:
### Step-by-Step Solution: 1. **Understanding the Assertion**: The assertion states that "the first step of gas exchange occurs through the body surface in some animals." This is true for certain animals, particularly amphibians, which can exchange gases through their skin. 2. **Understanding the Reason**: The reason given is that "the body surface or membrane of amphibians is thick in nature." This statement is incorrect. Amphibians, such as frogs, have a smooth and moist skin that is not thick. Their skin is adapted for gas exchange, allowing oxygen and carbon dioxide to diffuse easily. 3. **Conclusion**: Since the assertion is true (gas exchange occurs through the body surface in amphibians), but the reason is false (the skin of amphibians is not thick), we conclude that the assertion is true, and the reason is false. ### Final Answer: - Assertion: True - Reason: False
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