NEET BIOLOGY

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GENETICS AND EVOLUTION

EVOLUTION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Suppose a grasshopper population lives in a field that normally has green vegetation. For the past couple years, however, the area has been experiencing a drought that has made the field grass turn light brown. As a result, birds are able to find and eat the green grasshoppers more easily than those that are brown. Predict what will happen to the frequencies of the trait that codes for grasshopper color.
A
The frequency of the brown trait will increase, while the frequency of the green trait will decrease.
B
The frequencies will remain constant.
C
The frequency of the brown trait will decrease, while the frequency of the green trait will increase.
D
The brown grasshoppers will die off while the green grasshoppers will survive.
Explanation: 

Detailed explanation-1: -Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population. If they are met, natural selection automatically results.

Detailed explanation-2: -How will this affect natural selection of the grasshoppers? The green phenotype should be more easily seen by the predator and decrease in frequency. The brown phenotype should be more easily seen by the predator and decrease in frequency.

Detailed explanation-3: -Expert-Verified Answer. If the grasshopper population increases, there will be a large depletion will take place in plants which create starvation to other herbivores which in fact at last affect carnivores also which leads to the extinction of humans too..!!

Detailed explanation-4: -Natural selection can lead to speciation, where one species gives rise to a new and distinctly different species. It is one of the processes that drives evolution and helps to explain the diversity of life on Earth.

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