JAMB Biology 2012 Question 9

Question 9

Animal Kingdom

An animal body that can be cut along its axis in any plane to give two identical parts is said to be

  1. A.radially symmetrical
  2. B.bilaterally symmetrical
  3. C.asymmetrical
  4. D.symmetrical.
Show the answer and explanation

Answer: A (radially symmetrical)

Explanation

In radial symmetry (e.g. Hydra, starfish) any cut through the central axis gives two similar halves; bilateral symmetry allows only one such cut.