A) Hookworm
B) Liver fluke
C) Jellyfish
D) Leech
Correct Answer: A
Solution :
Body cavity or coelom is a fluid filled space between the gut and the outer body wall of an animal. On the basis of coelom the animals are of following types; (i) Acoelomates : The animals which do not have coelom are called acoelomate e. g., sponges, coelenterates, ctenophorens and flatworms. (ii) Pseudocoelomates: The animals have body cavity called pseuc derived from blastocoel of embryo round worms. (iii) Eucoelomates: The animals which have true coelom are called eucoelomates. the true coelom arise as a cavity in embryonic mesoderm. True coelom is of two types i.e., schizocoelom and enterocoelom.
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