Sawaal
2
Q:

Which one of the following has a bilateral symmetry in its body organization?

A) Asterias B) Sea anemone
C) Nereis D) Euchinus

Answer:   A) Asterias



Explanation:

Asterias has bilateral symmetry only at larval stagebut fivefold symmetry (pentamerism, a special type of radial symmetry) as adults.

Nereis do not possess any symmetry elements in their body organisation.

Subject: Biology
Exam Prep: Bank Exams
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