Which of the following animals have a single opening in their digestive system that serves both as a mouth and an anus?

Correct option is C

Phylum Platyhelminthes have a single opening in their digestive system that performs both as a mouth and an anus.
 Acoelomates and they include many free-living and parasitic life forms
 Also known as flatworms
 Kingdom - Animalia
 hermaphrodites, i.e., both male and female organs are present in the same body.
 They have an organ level of organization.
 Do not have a digestive tract.
 Respire by simple diffusion through the body surface.
 Reproduction- sexual (fusion of gametes) and asexual (regeneration by fission and regeneration).
 Internal fertilization and Regeneration quality