The characteristic feature of the member...

The characteristic feature of the members of phylum-Platyhelminthes is

all are free-living

all are found in damp terrestrial habitats

most of the species are endoparasites

both (a) and (b)

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Given below are few characteristic features of phylum -Platyhelminthes. I. The presence of ectodermal, endodermal and mesodermal layer. II. The presence of hydroskeleton. III. Bilateral symmetry IV. Complete digestive system.

II and IV

I, II and III

Only III

Only I

Sexes are not separated

fertilisation is internal and development is indirect

larva stage is found, which is morphologically different

All of these

Flat worms

Round worms

Segmented worms

Walking worms