Question

Which of the following algae exhibit isogamy?

• A. Spirogyra
• B. Ulothrix
• C. Ectocarpus
• D. All of the above

Answer 1

The correct option is D All of the above

Ulothrix and Ectocarpus produce same sized flagellate gametes. Spirogyra produces same-sized non-motile gametes. So the gametes produced by these algae are are similar in structure and their behaviour i.e., both gametes are either motile or non-motile.

This type of sexual reproduction in which the male and female gametes are similar in structure and behaviour is called isogamous reproduction or isogamy.