Single Choice

Which of the following statements are incorrect? (i) Parapodia are lateral appendages in arthropods used for swimming. (ii) RaduIa in molluscs are structures involved in excretion. (iii) Aschelminthes are dioecious. (iv) Echinoderm adults show radial symmetry. (v) Ctenophorans are diploblastic.

A(i) and (ii)
Correct Answer
B(i) and (iii)
C(i), (iv) and (ii)
D(iii) and (v)

Solution

Parapodia are present in some annelid worms.These area pair of flattened flesh lobes bearing numerous bristles. Radula (rasping organ) in molluscs is a structure involved in feeding.

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