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A. The pollen grain is generally spheric...

A. The pollen grain is generally spherical measuring about 25 - 50 cm in diameter.
B. In over 60% of angiosperms , pollen grains are shed at 2 celled stage.
Select the statement that holds true for the above statement .

A

Both 'A' and 'B' are correct

B

Only 'B' is correct

C

Only 'A' is correct

D

Both 'A' and 'B' are incorrect

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to evaluate the two statements provided about pollen grains and determine which one is true. ### Step-by-Step Solution: **Step 1: Analyze Statement A** - Statement A claims: "The pollen grain is generally spherical measuring about 25 - 50 cm in diameter." - Pollen grains are indeed generally spherical, but the measurement provided in the statement is incorrect. Pollen grains typically measure about 25 to 50 micrometers (µm) in diameter, not centimeters (cm). Therefore, this statement is **incorrect**. **Step 2: Analyze Statement B** - Statement B claims: "In over 60% of angiosperms, pollen grains are shed at the 2-celled stage." - This statement is accurate. In the majority of angiosperms (more than 60%), pollen grains are indeed shed when they are at the 2-celled stage, which consists of a vegetative cell and a generative cell. Therefore, this statement is **correct**. **Step 3: Conclusion** - Since Statement A is incorrect and Statement B is correct, the final conclusion is that **only Statement B is true**. ### Final Answer: - The correct option is that **only Statement B is correct**. ---
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