Select the correct statements.
(A) Platyhelminthes are triploblastic pseudocoelomate and bilaterally symmetrical organisms.
(B) Ctenophores reproduce only sexually and fertilisation is external.
(C) In tapeworm, fertilisation is internal but sexes are not separate.
(D) Ctenophores are exclusively marine, diploblastic and bioluminescent organisms.
(E) In sponges, fertilisation is external and development is direct.
Choose the correct answer from the options given below.

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(A), (C) and (D) only

(B), (C) and (D) only

(B) and (D) only

(A) and (E) only

answer is B.

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Detailed Solution

B, C and D only are correct. A and E are incorrect.
A. Platyhelminthes are triploblastic acoelomate and bilaterally symmetrical organisms.
B. Ctenophores reproduce only sexually and fertilisation is external.
C. In tapeworm (Platyhelminthes), sexes are united and fertilisation is internal.
D. Ctenophores are exclusively marine, diploblastic organisms. They exhibit bioluminescence.
E. In sponges, fertilisation is internal and development is indirect.

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