Question

In a male gametophyte, ploidy of tube cell and a male gamete is ________

• A. both are haploid
• B. both are diploid
• C. tube cell is haploid and male gamete is diploid
• D. tube cell is diploid and male gamete is haploid

Hint:

Rule: Gametophyte $\rightarrow$ Haploid Sporophyte $\rightarrow$ Diploid

Answer 1

The Correct Option is A

Concept: The male gametophyte in angiosperms is the pollen grain, which is haploid (n).
• Pollen grain contains:
• One vegetative (tube) cell
• One generative cell
• The generative cell divides to form two male gametes.

Step 1: Understand ploidy.
Since pollen grain is haploid, all its cells are haploid.

Step 2: Identify tube cell.
The vegetative (tube) cell is haploid.

Step 3: Identify male gametes.
Male gametes formed from generative cell are also haploid.

Step 4: Conclusion.
Both tube cell and male gametes are haploid. Final Answer: Option (A)