How can genetic drift and natural selection together contribute to speciation?
Answer and explanation
Correct answer: They can change trait frequencies differently in separated populations
The governing concept is divergence caused by both random and non-random evolutionary forces. Genetic drift changes allele frequencies by chance, especially in small isolated populations. Natural selection changes them because some heritable traits improve survival or reproduction in a particular environment. Acting differently in separate populations, these forces can build genetic and phenotypic differences. If reproductive isolation develops, speciation may result. Thus A is correct; B, C, and D are false.
Frequently asked questions
What is the correct answer to this question?
They can change trait frequencies differently in separated populations
Why is this the correct answer?
The governing concept is divergence caused by both random and non-random evolutionary forces. Genetic drift changes allele frequencies by chance, especially in small isolated populations. Natural selection changes them because some heritable traits improve survival or reproduction in a particular environment. Acting differently in separate populations, these forces can build genetic and phenotypic differences. If reproductive isolation develops, speciation may result. Thus A is correct; B, C, and D are false.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Heredity and Evolution. Topic: Evolution and speciation.
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