Question

In frog, the upper eye lid is

• A. Absent
• B. Slightly movable
• C. Rapidly movable
• D. Immovable

Answer 1

Answer: (B)

Slightly movable

Frogs have three eyelids in their eyes: Upper eyelid, lower eyelid and third eyelid. The upper eyelid of frog blinks and keep the eyes moist. The lower eyelid is immovable. The third eyelid is known as the nictitating membrane that keeps the eyes clean from mud and debris.

So the correct answer is 'Slightly movable'.