Question

Encircle the odd one out. Give reasons for your choice.

• A. Air bladder
• B. Gills
• C. Hollow bones
• D. Scales

Answer 1

The correct option is C

Hollow bones

Explanation of correct option:

1. Option C:.Hollow bones

Present in a bird's body. It has air cavities inside the bone.

Explanation for incorrect options:

2. Option A: Air bladder

Fishes have an air-filled bladder that provides buoyancy.

3. Option B: Gills

Fishes have gills for the exchange of gasses.

4. Option D: Scales

A fish’s entire body surface is covered with scales to protect the body from predator, environment.

Final answer: Hollow bones are present in the bird's body, while gills, air bladder, and scales are in the fish's body.