Question

In frog, the eyes are
A. Myopic on land
B. Hypermetropic in water
C. Bulging
D. All of the above

Answer 1

Myopic eye means short-sighted, Hypermetropic means far-sighted and bulging eyes are those which enables the frog to see in front, to the sides, and partially behind them.

Complete answer:
The eyes of the frog are better adapted for terrestrial vision and it is emmetropic which means in focus in air and it is hypermetropic which is far-sighted in water whereas eyes are better adapted for aquatic vision and it is emmetropic in water and myopic which is short-sighted in air.
If we look at option A i.e., Myopic on land. This is correct as the eyes of frogs are myopic on land which means that their eyes are nearsighted and the large round lens of the frog gives the animal a large field of view. They are naturally nearsighted which means myopic to -6 diopters which gives the focus of approx. 6 inches. They can also change their focus by moving the lens out and towards the corner.
Moving to option B i.e., Hypermetropic in water. Hypermetropic means far-sighted and the eyes of frogs are hypermetropic under the water as they are better adapted for terrestrial vision. Therefore this option also seems correct.
Moving to option C i.e., Bulging. Bulging eyes means that these eyes of frogs allow them to see in front, to the sides, and partially behind them. Therefore, this option also seems correct.
Last option D is All of the above. This option is correct as in frogs, the eyes are myopic on land, hypermetropic in water and bulging eyes too.

Thus, the correct answer is option D i.e., All the above.

Note: Eyes of frog are myopic, hypermetropic and bulging as they have myopic eyes on land i.e., short-sighted, hypermetropic eyes in water i.e., far sighted and bulging eyes in order to see in front, to the side and partially behind them. Therefore, the correct option is D i.e., All of the above.