In anisogamous type of sexual reproduction in algae

Options

A. Fusion takes place between morphologically and physiologically distinct gametes
B. Fusion takes place between morphologically similar and physiologically distinct gametes
C. Fusion takes place between physiologically similar and morphologically distinct gametes
D. Fusion of two gametes of same mother cell

Answer

### Step-by-Step Solution:

1. **Understanding Anisogamy**: Anisogamy is a type of sexual reproduction where the gametes involved are of different sizes and forms. In this case, we are discussing algae.

2. **Identifying Gamete Characteristics**: In anisogamous reproduction, the gametes are dissimilar in size. This means one gamete is typically larger and may be non-motile, while the other is smaller and motile.

3. **Differentiating from Other Types**:
- **Isogamy**: Involves gametes that are similar in size and shape.
- **Oogamy**: Involves a large non-motile female gamete and a smaller motile male gamete.

4. **Analyzing the Options**:
- Option 1: Fusion takes place between morphological and physiological distinct gametes.
- Option 2: Fusion takes place between morphologically similar and physiologically distinct gametes.
- Option 3: Fusion takes place between physiologically similar and morphologically distinct gametes.
- Option 4: Fusion of two gametes of the same mother cell.

5. **Correct Option Identification**: Since anisogamous gametes are morphologically and physiologically distinct, the correct answer is:
- **Option 1**: Fusion takes place between morphological and physiological distinct gametes.