First slide
Classification of Animals

Which of the following are the general characters of Platyhelminthes?
(a) Dorso-ventrally flattened body
(b) External fertilisation 
(c) Development is indirect 
(d) Sexes are separate


Flatworms have  a dorso-ventrally flattened body, internal fertilisation and indirect development. Sexes are not separate in them (except Schistosoma).

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