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Q.

Read the statements regarding echinoderms and choose the correct option 

I. All are marine with organ system level of organization

II. Adults are bilaterally symmetrical

III. They are dioecious

IV. Fertilisation is internal and indirect development is observed

V. Triploblastic and acoelomate animals

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a

I and V

b

I and III

c

I, III and V

d

Only V

answer is A.

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Detailed Solution

Adult Echinoderms show pentaradial symmetry, external fertilization with indirect development, triploblastic and enterocelomates.

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Read the statements regarding echinoderms and choose the correct option I. All are marine with organ system level of organizationII. Adults are bilaterally symmetricalIII. They are dioeciousIV. Fertilisation is internal and indirect development is observedV. Triploblastic and acoelomate animals