Q.

The figure shows three animals A, B and C. Select the option which gives correct identification of animals with body symmetry/description.

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a

C - Adamsia – Biradial : Can be divided into two identical halves through any plane.

b

B - Crab – Bilateral symmetry : Body can be divided into identical left and right halves in only one plane, that are mirror images of each other.

c

A - Hydra – Bilateral symmetry : The two identical halves are mirror images of each other.

d

A - Fasciola - Radial symmetry : When any plane passing through the central axis of the body divides the organism into two identical halves, that are mirror images of each other.

answer is B.

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Detailed Solution

B - Crab - Bilateral symmetry. The body can be divided into identical left and right halves in only one plane.

A - Hydra - Radial symmetry. Any plane passing through the central axis of the body divides the organism into two identical halves.

C - Adamsia - Radial symmetry.

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