The endosperm in gymnosperm is

Options

A. Gametophytic in nature
B. Formed after fertilization
C. The result of double fertilization
D. Formed from megaspore mother cell by mitosis

Answer

To answer the question about the nature of endosperm in gymnosperms, we can break down the solution into several steps:

### Step 1: Understanding Endosperm
The endosperm is a tissue that provides nourishment to the developing embryo within the seed. In flowering plants (angiosperms), it is typically triploid (3n) because it results from the fusion of one sperm cell with two polar nuclei during double fertilization.

### Step 2: Gymnosperms Overview
Gymnosperms are non-flowering vascular plants that produce seeds. They do not undergo double fertilization, which is a key characteristic that distinguishes them from angiosperms.

### Step 3: Nature of Endosperm in Gymnosperms
In gymnosperms, the endosperm is usually haploid (n) and is derived from the haploid megagametophyte. This megagametophyte develops from the megasporangium and provides nourishment to the embryo.

### Step 4: Analyzing the Options
1. **Haploid**: The endosperm in gymnosperms is indeed haploid, as it is derived from the gametophyte.
2. **Formed after fertilization**: This is incorrect for gymnosperms, as the endosperm is not formed after fertilization like in angiosperms.
3. **Result of double fertilization**: This is characteristic of angiosperms, not gymnosperms.
4. **Form of megasporangium mother cell by mitosis**: This is also incorrect as the endosperm is not formed by mitosis of the megasporangium mother cell.

### Conclusion
Based on the analysis, the correct option regarding the nature of endosperm in gymnosperms is that it is haploid and derived from the gametophyte.

### Final Answer
The endosperm in gymnosperms is haploid and derived from the gametophyte.

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