First slide

Classification of Animals

Question

Which of the following animals are true coelomates with bilateral symmetry?

Moderate

A

Adult Echinoderms
B

Aschelminthes
C

Platyhelminthes
D

Annelids

Solution

Annelids are true coelomates with bilateral symmetry, besides arthropods, molluscs (except gastropods) and chordates.
Adult echinoderms exhibit pentamerous radial symmetry.
Platyhelminthes and Aschelminthes are bilaterally symmetrical but are not true coelomates. Platyhelminthes are acoelomates while Aschelminthes are pseudocoelomates.

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