Question

Which one of the following statement is correct?

• A. Hard outer layer of pollen is called intine
• B. Sporogenous tissue is haploid
• C. Endothecium produces the microspores
• D. Tapetum nourishes the developing pollen

Hint:

Exine is the hard outer pollen wall, while tapetum is the nutritive layer for developing pollen grains.

Answer 1

The Correct Option is D

Concept:
A pollen grain has two main wall layers: \[ \text{Exine} \] and \[ \text{Intine} \] The anther also has a nutritive layer called tapetum.

Step 1: Check option (A).
The hard outer layer of pollen is called exine. Intine is the inner layer. So, option (A) is incorrect.

Step 2: Check option (B).
Sporogenous tissue is diploid. It gives rise to microspore mother cells. So, option (B) is incorrect.

Step 3: Check option (C).
Endothecium helps in anther dehiscence. It does not produce microspores. Microspores are produced by meiosis in microspore mother cells. So, option (C) is incorrect.

Step 4: Check option (D).
Tapetum is the innermost layer of the anther wall. It provides nutrition to developing pollen grains. So, option (D) is correct.

Step 5: Final conclusion.
Hence: \[ \boxed{\text{(D) Tapetum nourishes the developing pollen}} \]