in which of the following kinds of animals are triploblastic

Options

A. Fish
B. Roundworm
C. Earthworm
D. Liver fluke

Answer

D

Explanation

(d) Self fertilization is fusion of male and female gametes (sex cells) produced by the same individual self fertilization occurs in bisexual organisms including most flowering plants, numerous protozoans and many invertebrates. Fluke are hermaphrodites, meaning each worm has both ovaries and testes. Probably cross fertilization is the rule but self fertilization is certainly a possibility In any case It means that every individual is capable of producing fertilized eggs, certainly and advantage in species in which a high reproductive output is required.