In majority of sexually reproducing organisms, the gametes produced are of two morphologically distinct types called.

Options

A. Antherozoids
B. Heterosomes
C. Heterogametes
D. Homogametes

Answer

**Step-by-Step Solution:**

1. **Understanding Gametes**: In sexually reproducing organisms, gametes are the reproductive cells that fuse during fertilization. They are crucial for sexual reproduction.

2. **Identifying Types of Gametes**: Gametes can be classified based on their morphology (shape and structure). In many organisms, there are two distinct types of gametes: one is typically larger and non-motile (often the egg), and the other is smaller and motile (often the sperm).

3. **Analyzing the Options**:
- **Antherozoites**: This term refers to spermatozoids, which are male gametes. However, it does not refer to the distinction between two types of gametes.
- **Heterozones**: This term relates to the presence of different chromosome sets in different sexes, not specifically to gametes.
- **Heterogametes**: This term means "different gametes." It directly refers to the two morphologically distinct types of gametes produced in sexual reproduction.
- **Homogametes**: This term refers to similar gametes, which does not apply to the question.

4. **Conclusion**: The correct answer is "heterogametes," as it specifically denotes the two morphologically distinct types of gametes produced in sexually reproducing organisms.

**Final Answer**: Heterogametes.

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