Spirogyra are green algae that can reproduce sexually. Which of the following features identifies reproduction in Spirogyra as sexual reproduction?

Question

The cells of parent algae have nuclei.
Each offspring contains chloroplasts.
Several offspring may be produced at once.
Genetic material is contributed by two parent cells.

Answer 1

The feature that identifies reproduction in Spirogyra as sexual reproduction is:

Genetic material is contributed by two parent cells.

In sexual reproduction, there is a fusion of genetic material from two parent organisms, resulting in offspring that have genetic contributions from both parents. This is a key distinguishing characteristic of sexual reproduction. The other options provided may relate to the overall process of reproduction but do not specifically define it as sexual reproduction.