Which one of the following has a bilateral symmetry in its

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

A. Asterias

B. Sea anemone

C. Nereis

D. Euchinus

Answer: Option A

Solution (By Examveda Team)

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.

Ozone hole refers to

A. hole in ozone layer

B. decrease in the ozone layer in troposphere

C. decrease in thickness of ozone layer in stratosphere

D. increase in the thickness of ozone layer in troposphere

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

Solution (By Examveda Team)

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