Consider the following statements and choose the correct option.
I. Primary endosperm nucleus is triploid.
II. In grass and water lily plant, pollination occurs through water.
III. Tapetum nourishes the developing pollen grains.
IV. Hilum represents the junction between ovule and funiculus.

Options

A. I, II and III are correct, but IV is Incorrect
B. I, II and IV are correct, but III is incorrect
C. II, III and IV are correct, but is incorrect
D. I, III and IV are correct, but II is incorrect

Answer

To solve the question, we need to evaluate each of the statements provided and determine their correctness.

**Step 1: Evaluate Statement I**
- **Statement I**: "Primary endosperm nucleus is triploid."
- **Explanation**: The primary endosperm nucleus (PEN) is formed when a male gamete fuses with two polar nuclei in the embryo sac. Since the male gamete is haploid (1N) and the two polar nuclei are both haploid (1N each), their fusion results in a triploid (3N) nucleus. Therefore, this statement is **correct**.

**Step 2: Evaluate Statement II**
- **Statement II**: "In grass and water lily plant, pollination occurs through water."
- **Explanation**: Pollination can occur through various mechanisms, including wind, water, and insects. Grass generally relies on wind for pollination, while water lilies can be pollinated by insects as well as wind. Therefore, stating that both grass and water lily primarily use water for pollination is **incorrect**.

**Step 3: Evaluate Statement III**
- **Statement III**: "Tapetum nourishes the developing pollen grains."
- **Explanation**: The tapetum is a layer of cells in the anther that provides nourishment to the developing pollen grains. It plays a crucial role in the development and maturation of pollen. Therefore, this statement is **correct**.

**Step 4: Evaluate Statement IV**
- **Statement IV**: "Hilum represents the junction between ovule and funiculus."
- **Explanation**: The hilum is indeed the point of attachment between the ovule and the funiculus (the stalk that connects the ovule to the ovary). Therefore, this statement is **correct**.

**Final Evaluation of Statements:**
- Statement I: Correct
- Statement II: Incorrect
- Statement III: Correct
- Statement IV: Correct

**Conclusion**: The correct options are I, III, and IV.

**Correct Answer**: Statements I, III, and IV are correct.

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