Identify the type of body symmetry of the animals shown in the given pictures :[(A) a sponge with an irregular, porous body. (B) a Hydra/jellyfish-like animal with tentacles arranged around a central mouth. (C) a goat standing on four legs.]

Answer: (A) Asymmetrical (no symmetry) — sponge. (B) Radial symmetry — Hydra/jellyfish. (C) Bilateral symmetry — goat.

In radial symmetry the body can be divided into two similar halves by any plane passing through the central axis, as in Hydra, jellyfish and starfish. In bilateral symmetry the body can be divided into two similar right and left halves by only one plane, as in the goat, earthworm and man. Sponges have no regular body plan, so they are asymmetrical.