True or False: Cestodes (tapeworms) are all dioecious.

Cestodes, commonly known as tapeworms, exhibit a unique reproductive strategy that differs from the typical dioecious setup found in many other animal groups. While some tapeworms may have separate sexes, the majority are monoecious, meaning that they possess both male and female reproductive organs within the same individual. This allows them to reproduce independently without the need for a mate, which is particularly advantageous in their parasitic lifestyle, where finding a partner might be difficult.

The misconception that all tapeworms are dioecious likely stems from a misunderstanding of their reproductive biology. Certain species do have distinct male and female individuals, but this is not the norm across the group. Therefore, the assertion that all cestodes are dioecious is false. This understanding of tapeworm biology highlights their adaptability and the complexities of their life cycles in parasitic environments.