Answer this question: Spirogyra are green algae that can reproduce sexually. Which of the following features identifies reproduction in Spirogyra as sexual reproduction?
OPT:
(A). The cells of parent algae have nuclei.;
(B). Each offspring contains chloroplasts.;
(C). Several offspring may be produced at once.;
(D). Genetic material is contributed by two parent cells.;. Answer:
(D).