Select the wrong statement

Options

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

Answer

To solve the question of selecting the wrong statement regarding gametes in oomycetes and other types of reproduction, we will follow these steps:

### Step 1: Understand the Types of Gametes
- **Oomycetes**: These are also known as water molds. They have distinct characteristics regarding their gametes.
- **Female Gamete**: In oomycetes, the female gamete is larger and non-motile.
- **Male Gamete**: The male gamete is smaller and motile.

### Step 2: Analyze the Statements
- **Statement 1**: "In oomycetes, the female gamete is smaller and motile while the male gamete is larger and non-motile."
- This statement is incorrect based on the definitions provided. The female gamete is actually larger and non-motile, while the male gamete is smaller and motile.

- **Statement 2**: "Chlamydomonas exhibits both isogamy and anisogamy."
- This statement is true. Chlamydomonas can reproduce both ways.

- **Statement 3**: "Fucus shows oogamy."
- This statement is true. Oogamy is a type of reproduction where the female gamete is larger than the male gamete.

- **Statement 4**: "Isogametes are similar in structure, function, and behavior."
- This statement is also true. Isogametes are morphologically similar.

### Step 3: Identify the Wrong Statement
- After analyzing all statements, it is clear that **Statement 1** is the wrong statement.

### Conclusion
The wrong statement is: "In oomycetes, the female gamete is smaller and motile while the male gamete is larger and non-motile."

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