How can genetic drift and natural selection both contribute to speciation?
Answer and explanation
Correct answer: They can change trait frequencies in separated groups
The governing concept is that speciation develops when populations become genetically different enough to form separate species. Genetic drift changes allele frequencies by chance, especially in small or isolated populations, whereas natural selection increases heritable traits that improve survival or reproduction in a particular environment. Over many generations, these changes can reduce gene flow and produce reproductive isolation. Therefore, option A is correct; the other options incorrectly describe gene loss, prevention of reproduction, or acquired traits.
Frequently asked questions
What is the correct answer to this question?
They can change trait frequencies in separated groups
Why is this the correct answer?
The governing concept is that speciation develops when populations become genetically different enough to form separate species. Genetic drift changes allele frequencies by chance, especially in small or isolated populations, whereas natural selection increases heritable traits that improve survival or reproduction in a particular environment. Over many generations, these changes can reduce gene flow and produce reproductive isolation. Therefore, option A is correct; the other options incorrectly describe gene loss, prevention of reproduction, or acquired traits.
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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