In sexual reproduction of algae fusion between one large, non-motile (static) female gamete and a smaller motile male gamete is termed as

Options

A. Isogamous
B. Anisogamous
C. Oogamous
D. None of these

Answer

To solve the question regarding the type of fusion that occurs in the sexual reproduction of algae between a large, non-motile female gamete and a smaller, motile male gamete, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Types of Gametes**:
- In sexual reproduction, gametes can be classified based on their size and motility.
- There are three main types of gametic fusion:
- **Isogamous**: Fusion between two similar gametes that are typically motile.
- **Anisogamous**: Fusion between two gametes that differ in size and/or motility, but both are motile.
- **Oogamous**: Fusion between a large, non-motile female gamete and a smaller, motile male gamete.

2. **Identify the Gametes in the Question**:
- The question specifies that we have one large, non-motile female gamete and a smaller, motile male gamete.
- This description matches the definition of oogamous reproduction.

3. **Select the Correct Answer**:
- Given the definitions:
- Isogamous does not apply because the gametes are not similar.
- Anisogamous does not apply because both gametes are not motile.
- Oogamous fits perfectly as it describes the fusion of a large, non-motile female gamete with a smaller, motile male gamete.
- Therefore, the correct answer is **C. Oogamous**.

### Final Answer:
The fusion between one large, non-motile female gamete and a smaller motile male gamete in the sexual reproduction of algae is termed as **C. Oogamous**.

---