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Select the wrong statement:

1. Anisogametes differ either in structure, function or behaviour.
2. In oomycetes female gamete is smaller and motile, while male gamete is larger and non-motile.
3. Chlamydomonas exhibits both isogamy and anisogamy and Fucus shows oogamy.
4. Isogametes are similar in structure, function and behaviour.

Correct answer: In oomycetes female gamete is smaller and motile, while male gamete is larger and non-motile.

Solution

The wrong statement reverses the usual roles in oomycetes. In these organisms, the female gamete is typically larger and non-motile, while the male gamete is smaller and motile.

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