All isogamy, anisogamy and oogamy are found in which of the following?

Options

A. Spirogyra
B. Ulothrix
C. Oscillatoria
D. Chlamydomonas

Answer

To solve the question regarding which organism exhibits all three types of sexual reproduction: isogamy, anisogamy, and oogamy, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Types of Reproduction**:
- **Isogamy**: This is a type of sexual reproduction where the gametes are of the same size and shape. They can be flagellated or non-flagellated.
- **Anisogamy**: In this type, the gametes are of different sizes. Typically, one gamete is larger (female) and non-motile, while the other is smaller (male) and motile.
- **Oogamy**: This is a specific type of anisogamy where the female gamete is large and non-motile, and the male gamete is small and motile.

2. **Identify the Organisms**:
- The options given are Spirogyra, Lotrix, Oscillatoria, and Chlamydomonas.
- **Spirogyra**: Primarily exhibits isogamy.
- **Lotrix**: An example of isogamy.
- **Oscillatoria**: Does not exhibit any of these types of sexual reproduction.
- **Chlamydomonas**: Known to exhibit all three types of reproduction: isogamy, anisogamy, and oogamy.

3. **Conclusion**:
- After analyzing the types of reproduction in each organism, we conclude that **Chlamydomonas** is the organism that exhibits all three types of sexual reproduction: isogamy, anisogamy, and oogamy.

### Final Answer:
The correct option is **Chlamydomonas**.

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