Light is registered in the retina when photons hit molecules of the pigment rhodopsin and change the molecules' shape. Even when they have not been struck by photons of light, rhodopsin molecules sometimes change shape because of normal molecular motion, thereby introducing error into the visual system. The amount of this molecular motion is directly proportional to the temperature of the retina. Which one of the following conclusion is most strongly supported by the information above? Options: A . &nbspThe temperature of an animal's retina depends on the amount of light the retina is absorbing. B . &nbspThe visual systems of animals whose body temperature matches that of their surroundings are more error-prone in hot surroundings than in cold ones. C . &nbspAs the temperature of the retina rises, rhodopsin molecules react more slowly to being struck by photons. D . &nbspRhodopsin molecules are more sensitive to photons in animals whose retinas have large surface areas than in animals whose retinas have small surface areas. E . &nbspABABA

Light is registered in the retina when photons hit molecules of the pigment rhod

Question

Light is registered in the retina when photons hit molecules of the pigment rhodopsin and change the molecules' shape. Even when they have not been struck by photons of light, rhodopsin molecules sometimes change shape because of normal molecular motion, thereby introducing error into the visual system. The amount of this molecular motion is directly proportional to the temperature of the retina. Which one of the following conclusion is most strongly supported by the information above?

Options:

A . The temperature of an animal's retina depends on the amount of light the retina is absorbing.

B . The visual systems of animals whose body temperature matches that of their surroundings are more error-prone in hot surroundings than in cold ones.

C . As the temperature of the retina rises, rhodopsin molecules react more slowly to being struck by photons.

D . Rhodopsin molecules are more sensitive to photons in animals whose retinas have large surface areas than in animals whose retinas have small surface areas.

E . ABABA

Answer: Option B
:
B
Option (a) relates the temperature of the body to the amount of light absorbed by the retina. This relation has not been mentioned in the passage. The temperature is only related to the molecular motion. Hence option (a) is eliminated. Option (c) is not supported by the paragraph because there is no mention of the speed with which the rhodopsin molecules react to photons in the paragraph. Option (d) is eliminatedas the paragraph does not draw any relation to the surface area of the retinas.
Option (b) draws a correct conclusion between the temperature of the body and the errors incurred. If the animal is in a hot surrounding, its molecular motion will increase and the rhodopsin molecule will change shape even without light registering in the retina. This leads to errors. Hence option (b) is the correct answer.

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