Read the following statements and use one of the combinations to fill the gaps. In Chlamydomonas, Volvox, & spirogyra fusion of gametes is………… , …………& ………. respectively

Options

A. isogamous , anisogamous & oogamous
B. oogamous ,isogamous & anisogamous
C. anisogamous ,oogamous & isogamous
D. isogamous , isogamous & anisogamous

Answer

To solve the question regarding the fusion of gametes in Chlamydomonas, Volvox, and Spirogyra, we will analyze each organism based on their reproductive strategies.

### Step-by-Step Solution:

1. **Identify the type of gamete fusion in Chlamydomonas**:
- Chlamydomonas reproduces sexually through a process called **anisogamy**. In this type, the gametes are of different sizes. One gamete is typically larger and non-motile, while the other is smaller and motile.

2. **Identify the type of gamete fusion in Volvox**:
- Volvox also reproduces through **oogamy**. In this case, the fusion involves one large, non-motile gamete (the egg) and smaller, motile gametes (the sperm).

3. **Identify the type of gamete fusion in Spirogyra**:
- Spirogyra reproduces through **isogamy**. In this type, the gametes are similar in size and shape, and they can be either motile or non-motile.

### Final Answer:
Thus, the fusion of gametes in Chlamydomonas, Volvox, and Spirogyra is **anisogamous, oogamous, and isogamous**, respectively.