If a lizard population is divided into two groups by a river, what may happen over a long time?
Answer and explanation
Correct answer: Different variations may accumulate in both groups and a new species may form
The river can act as a geographical barrier, reducing gene flow and mating between the two lizard groups. Over many generations, mutation, recombination, natural selection, and genetic drift may make the groups increasingly different. If they eventually cannot interbreed successfully, speciation can occur. Hence option A is correct; the other outcomes are unsupported.
Frequently asked questions
What is the correct answer to this question?
Different variations may accumulate in both groups and a new species may form
Why is this the correct answer?
The river can act as a geographical barrier, reducing gene flow and mating between the two lizard groups. Over many generations, mutation, recombination, natural selection, and genetic drift may make the groups increasingly different. If they eventually cannot interbreed successfully, speciation can occur. Hence option A is correct; the other outcomes are unsupported.
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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