Read statements (a-c) regarding pollen grains and select the option that has correct statements.
a. The generative cell floats in the cytoplasm of the vegetative cell.
b. Sporollenin is absent at germ pores.
c. Pollen grain measures about 25-50 micrometer in diameter.

Options

A. a,b and c
B. Only b and c
C. only a
D. only a and b

Answer

To determine which statements regarding pollen grains are correct, let's analyze each statement one by one.

**Step 1: Analyze Statement A**
- Statement A: "The generative cell floats in the cytoplasm of the vegetative cell."
- Explanation: In pollen grains, the generative cell is indeed located within the vegetative cell. The vegetative cell is larger and contains the generative cell floating in its cytoplasm. This statement is correct.

**Step 2: Analyze Statement B**
- Statement B: "Sporollenin is absent at germ pores."
- Explanation: Sporopollenin is a robust and resistant substance that forms the outer layer of the pollen grain. However, at the germ pores, this outer layer is absent, allowing for the germination of the pollen grain. This statement is also correct.

**Step 3: Analyze Statement C**
- Statement C: "Pollen grain measures about 25-50 micrometer in diameter."
- Explanation: Pollen grains typically measure around 20 to 25 micrometers in diameter, but some can be larger, reaching up to 50 micrometers. Therefore, this statement is generally considered correct as it encompasses the range of sizes.

**Conclusion:**
All three statements A, B, and C are correct regarding pollen grains.

**Final Answer:**
The correct statements are A, B, and C.

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