Which of the following animals shows metamerism?

Correct answer: (b) Earthworm

Explanation

Metamerism is the division of the body into a series of similar segments (metameres) along its length, each repeating parts of the body organs. True metamerism is seen in annelids such as the earthworm, and in arthropods and chordates.

• Amoeba is a single cell.
• Hydra (a cnidarian) and Planaria (a flatworm) are not segmented.