Which of the following statements is correct ?

Options

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

Answer

To solve the question, we need to analyze each of the four statements provided and determine which one is correct.

1. **Endothelium produces the microspore.**
- This statement is incorrect. The endothelium is not responsible for producing microspores. Microspores are produced from the sporogenous tissue within the microsporangium.

2. **Tapetum nourishes the pollen grain.**
- This statement is correct. The tapetum is the innermost layer of the microsporangium and is responsible for nourishing the developing pollen grains.

3. **Hard outer layer of pollen is called entine.**
- This statement is incorrect. The hard outer layer of the pollen grain is called the exine, while the inner layer is called the intine.

4. **Sporogenous tissue is haploid.**
- This statement is incorrect. The sporogenous tissue is diploid and undergoes meiosis to produce haploid microspores.

Based on the analysis, the correct statement is the second one: "Tapetum nourishes the pollen grain."

### Step-by-Step Solution:
1. **Identify the statements**: Read through the four statements provided.
2. **Analyze each statement**: Evaluate the accuracy of each statement based on biological knowledge.
- Statement 1: Incorrect (endothelium does not produce microspores).
- Statement 2: Correct (tapetum nourishes pollen grains).
- Statement 3: Incorrect (the hard outer layer is called exine, not entine).
- Statement 4: Incorrect (sporogenous tissue is diploid, not haploid).
3. **Select the correct statement**: After analysis, identify that the second statement is the only correct one.