Oogamous sexual reproduction involves fusion of

Options

A. Motile and nonmotile gametes
B. Similar gametes
C. Dissimilar motile gametes
D. Dissimilar nonmotile gametes.

Answer

To solve the question regarding oogamous sexual reproduction, we will follow these steps:

### Step-by-Step Solution:

1. **Understand Oogamous Sexual Reproduction**:
- Oogamous reproduction is a type of sexual reproduction characterized by the fusion of two different types of gametes: one motile male gamete and one non-motile female gamete.

2. **Identify the Types of Gametes**:
- In oogamous reproduction, the male gamete is motile (able to move), while the female gamete is non-motile (unable to move) and typically larger in size.

3. **Differentiate Between Types of Reproduction**:
- There are different types of sexual reproduction based on the nature of gametes:
- **Isogamous**: Fusion of similar gametes (both motile or both non-motile).
- **Anisogamous**: Fusion of dissimilar gametes (one motile and one non-motile).
- **Oogamous**: A specific type of anisogamous reproduction where the female gamete is significantly larger and non-motile.

4. **Analyze the Options Provided**:
- Option 1: Motile and non-motile gametes (Correct)
- Option 2: Similar gametes (Incorrect, as they are dissimilar)
- Option 3: Dissimilar motile gametes (Incorrect, as one is non-motile)
- Option 4: Dissimilar non-motile gametes (Incorrect, as one is motile)

5. **Select the Correct Answer**:
- Based on the definitions and characteristics discussed, the correct answer to the question "Oogamous sexual reproduction involves fusion of" is **Option 1: motile and non-motile gametes**.

### Final Answer:
Oogamous sexual reproduction involves the fusion of **motile and non-motile gametes**.

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