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Assertion: in dicot leaf, epidermic cove...

Assertion: in dicot leaf, epidermic covers both the upper surface (adaxial epidermis) and lower surface (abaxial epidermis)
Reason: The adaxial epidermis bears more stomata than the abaxial epidermis.

A

If both assertion and reason are true and reason is the correct explanantion of assertion

B

if both assertion and reason are true but reason is not the correct explanation of 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 in a dicot leaf, the epidermis covers both the upper surface (adaxial epidermis) and the lower surface (abaxial epidermis). - This is true because dicot leaves are typically dorsiventral, meaning they have distinct upper and lower surfaces, each covered by epidermis. 2. **Analyzing the Reason**: - The reason given is that the adaxial epidermis bears more stomata than the abaxial epidermis. - This statement is incorrect. In fact, the adaxial surface usually has fewer stomata compared to the abaxial surface. 3. **Explaining the Stomata Distribution**: - The adaxial surface (upper surface) of the leaf is more exposed to sunlight and environmental conditions, which can lead to increased water loss through transpiration. - To minimize this water loss, the number of stomata on the adaxial surface is reduced. Conversely, the abaxial surface (lower surface) typically has more stomata to facilitate gas exchange while minimizing water loss. 4. **Conclusion**: - Since the assertion is true (the epidermis covers both surfaces) but the reason is false (the adaxial surface does not have more stomata), we conclude that the assertion is correct while the reason is incorrect. ### Final Answer: - The assertion is true, but the reason is false.
### Step-by-Step Solution: 1. **Understanding the Assertion**: - The assertion states that in a dicot leaf, the epidermis covers both the upper surface (adaxial epidermis) and the lower surface (abaxial epidermis). - This is true because dicot leaves are typically dorsiventral, meaning they have distinct upper and lower surfaces, each covered by epidermis. 2. **Analyzing the Reason**: - The reason given is that the adaxial epidermis bears more stomata than the abaxial epidermis. ...
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