Question

Write the correct alternative:
(v) Animal with bilateral symmetry is .................................... .

• A. Star fish
• B. Human
• C. Paramoecium
• D. Amoeba

Hint:

To identify bilateral symmetry, look for a single plane producing two mirror halves and paired structures on either side of the midline.

Answer 1

The Correct Option is B

Bilateral symmetry means the body can be divided into two mirror-image halves along a single plane called the sagittal plane. Humans exhibit clear bilateral symmetry: the left and right sides of the body are mirror images in external form and arrangement of paired structures such as eyes, limbs, ears, and kidneys. This symmetry is associated with cephalization and directional movement in many animals. Starfish display radial symmetry where body parts are arranged around a central axis and can be divided into similar halves by multiple planes through that axis; Paramoecium and Amoeba are unicellular organisms that show no true bilateral or radial symmetry and are effectively asymmetrical in shape and movement. Therefore, among the options given, human is the correct example of bilateral symmetry.