Question

In which of the following, male gametes are flagellated?

• A. Ectocarpus
• B. Anabaena
• C. Spirogyra
• D. Polysiphonia

Answer 1

The correct option is A

Ectocarpus

The correct option is option A.

Explanation of the correct options:

1. Ectocarpus is a member of brown algae.
2. They are marine, found in shallow water.
3. The thallus of brown algae consists of a branched filamentous structure.
4. Reproduction takes place by vegetative, asexual, and sexual means.
5. They have biflagellated zoospores.

Explanation of the incorrect options:

Option B:

1. Anabaena is a member of cyanobacteria.
2. It lacks flagellated zoospores.

Option C:

1. Spirogyra is a member of green algae.
2. It produces non-flagellated gametes.

Option D:

1. Polysiphonia is a member of red algae.
2. It does not have any flagellated cells.

Final answer: In Ectocarpus male gametes are flagellated.