Read the two incidents given below.
Incident 1: A species of moth is preyed on by bats. Over hundreds of years, the moths develop a sophisticated pattern of flying when they hear the screech of a bat and which helps them to escape danger. Other changes occurs like, when the current moth mates with its ancestor moth, no viable eggs are produced.
Incident 2: A species of frogs is living in a pond near an earthquake fault line. A earthquake separates the frog population into two separate populations. After hundreds of years, the two groups are unable to mate.
Incident 2 is an example of

Survival of the fittest

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Convergent evolution

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Divergent evolution

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Stabilizing selection

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Directional selection

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Solution

The correct option is C Divergent evolution
Species is group of individuals that can potentially interbreed to produce fertile offspring. Geographical isolation of two population prevented gene flow among the them and accumulation of genetic variation with time diverged then into two different species which are no longer able to interbreed. Evolution of population in different directions from a common ancestry leads for development of new species and is called as divergent evolution. Convergent evolution leads to merging of two different populations into one. Survival of fittest refers to unequal ability of individuals to survive and reproduce based on suitability of their inherited characters to prevailing environmental conditions; this is not mentioned in case 2. Stabilizing and direction selection represent two different modes of natural selection.
Therefore, the correct answer is option C.

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Similar questions

Read the two incidents given below.

Incident 1: A species of moth is preyed on by bats. Over hundreds of years, the moths develop a sophisticated pattern of flying when they hear the screech of a bat and which helps them escape danger. Other changes occur as well, when current moth mates with its ancestor moth, no viable eggs are produced.

Incident 2: A species of frogs is living in a pond near an earthquake fault line. An earthquake separates the frog population into two separate populations. After hundreds of years, the two population are not able to mate.

Based on the second incident, mating between two groups of frogs is not possible as they have now become different:

Read the two incidents given below.

Incident 1: A species of moth is preyed on by bats. Over hundreds of years, the moths develop a sophisticated pattern of flying when they hear the screech of a bat and which helps them to escape danger. Other changes occur as well, when the current moth mate with its ancestor moth, no viable eggs are produced.

Incident 1 and incident 2 are similar as they both show

Read the two incidents given below.

Incident 1: A species of moth is preyed on by bats. Over hundreds of years, the moths develop a sophisticated pattern of flying when they hear the screech of a bat. This helps them escape danger. Other changes occur like, when the current moth mates with its ancestor moth, no viable eggs are produced.

Suppose an earthquake takes place in incident 2 which leaves one of the groups of frogs without water. In that case, the survival of frogs will take place or not?

Q. Read the following passage and answer the following question.
In 1910, a small town on the East Coast of the United States relied primarily on agriculture to support its economy. In the mid-1930s, a steel mill was built, and the economy shifted from being agriculturally supported to being industrially supported. The steel mill released a lot of smog and soot into the air, which collected on the bark of trees in a wooded area near the outskirts of town. Over a period of ten years the bark gradually darkened, then maintained a constant dark color. A variety of animals and insects lived in the wooded area. In particular, a certain species of moth served as the primary food source for a population of birds. The moths lay their eggs in the bark of the trees and, thus, must spend a fair amount of time sitting on the tree trunks. Table 1 presents data on the moth population.Table 1

Year	White moths (%)	Black moths (%)
1910	95	5
1920	95	5
1930	95	5
1940	50	50
1950	20	80
1960	5	95

Birds track their prey visually, whereas bats rely on sonar to locate to locate their food. If the bird population were replaced with a bat population in 1940, what would be the ratio of white moths to black moths?

Q. Two species of frogs inhabit the same fresh water pond habitat. One species of frog sings its mating song in early May, while the other species of frog sings its mating song in late June.
These two frogs species are able to remain completely separate species due to which isolating mechanism ?

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