Which of the following generations occur in seed of gymnosperms?

Options

A. Two gametophytic generation
B. One sporophytic and one gametophytic
C. Two sporophytic and one gametophytic generation
D. Three sporophytic generation

Answer

To determine the generations that occur in the seed of gymnosperms, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Generations in Plants**:
- In the plant kingdom, there are two main types of generations: sporophytic (diploid) and gametophytic (haploid).
- Sporophytes produce spores, while gametophytes produce gametes.

2. **Identifying the Generations in Gymnosperms**:
- Gymnosperms are seed-producing plants that do not undergo double fertilization, unlike angiosperms.
- In gymnosperms, the seed contains a diploid zygote and haploid endosperm.

3. **Analyzing the Components of the Seed**:
- The zygote (2N) develops into the embryo, which is part of the sporophytic generation.
- The endosperm (N) is a haploid tissue that serves as nourishment for the developing embryo and represents the gametophytic generation.

4. **Counting the Generations**:
- In a gymnosperm seed, there are:
- One sporophytic generation (the embryo from the zygote).
- One gametophytic generation (the endosperm).
- Additionally, the seed coat and surrounding tissues are also sporophytic, but they are not counted as separate generations.

5. **Conclusion**:
- Therefore, in the seed of gymnosperms, there are two sporophytic generations (the seed coat and the embryo) and one gametophytic generation (the endosperm).
- The correct answer is: **1 sporophytic and 1 gametophytic generation**.

### Final Answer:
The correct option is: **1 sporophytic and 1 gametophytic generation**.

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