Question

The sexual reproduction in Spirogyra is

• A. Oogamous
• B. Isogamous
• C. Conjugation
• D. Cleistogamous

Answer 1

The correct option is B

Isogamous

The correct option is B.

Explanation of the correct option:

1. Spirogyra is an filamentous green alga.
2. Sexual reproduction in Spirogyra takes place by the fusion of two non-flagellated gametes of similar size.
3. Such reproduction is called isogamous.

Explanation of the incorrect options:

Option A:

Fusion between two gametes where the female gamete is large, and non-motile and the male gamete is smaller is known as oogamous.

Option C:

Conjugation takes place in bacteria, used to transfer genetic material from one bacteria to another by direct contact.

Option D:

Cleistogamous is a type of flower which does not open and exhibits self-pollination.

Final answer: The sexual reproduction in Spirogyra is isogamous.