Select the wrong statements:-

Options

A. (a) In Oomycetes, female gamete is smaller and motile, while male gamete is larger and non- motile.
B. (b) Chlamydomonas exhibits both isogamy and anisogamy and Fucus shows oogamy.
C. (c) Isogametes are similar in structure, function and behaviour.
D. (d) Anisogametes differ either in structure, function or behavior.

Answer

To solve the question, we need to analyze each statement provided and determine which ones are incorrect.

### Step-by-Step Solution:

1. **Analyze Statement A**:
- The statement claims that in oomycetes, the female gamete is smaller and motile while the male gamete is larger and non-motile.
- This is incorrect because, in oomycetes, the female gamete is actually larger and non-motile, while the male gamete is smaller and motile.
- **Conclusion**: Statement A is wrong.

2. **Analyze Statement B**:
- The statement mentions that Chlamydomonas exhibits isogamy, anisogamy, and Fucus shows oogamy.
- This is correct. Chlamydomonas can reproduce via isogamy (similar gametes), while Fucus (a brown algae) reproduces via oogamy (dissimilar gametes).
- **Conclusion**: Statement B is correct.

3. **Analyze Statement C**:
- The statement claims that isogametes are similar in structure, function, and behavior.
- This is true, as isogametes are indeed similar in these aspects.
- **Conclusion**: Statement C is correct.

4. **Analyze Statement D**:
- The statement asserts that anisogamy differs in either structure, function, or behavior.
- This is also true, as anisogamy involves gametes that are different in size and/or motility.
- **Conclusion**: Statement D is correct.

### Final Conclusion:
The only wrong statement is **Statement A**.