Most, but not all, roundworms are dioecious. Explain.
a. Most roundworms have both male and female reproductive organs in the same individual.
b. Most roundworms reproduce asexually, but some have separate sexes.
c. Most roundworms are hermaphroditic, while a few species are dioecious.
d. Most roundworms have separate sexes, with distinct male and female individuals.
