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Q.

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

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a

(i) and (ii)

b

(i) and (iii)

c

(i), (iv) and (v)

d

(iii) and (v)

answer is A.

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Detailed Solution

Aquatic annelids like Nereis possess lateral appendages (called parapodia) which help in swimming. 

Radula is the rasping organ for feeding which is present in the mouth of molluscs.

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