Why must variation be inherited for natural selection to act over generations?
Answer and explanation
Correct answer: Only then can a useful trait pass to offspring.
Natural selection changes the composition of a population across generations, not merely the condition of one individual. A variation that improves survival or reproduction can influence evolution only when it is transmitted to offspring. If the variation is not inherited, it disappears when the individual dies and cannot become more frequent in the population. Therefore option A is correct; digestion and chromosome destruction are unrelated to this requirement.
Frequently asked questions
What is the correct answer to this question?
Only then can a useful trait pass to offspring.
Why is this the correct answer?
Natural selection changes the composition of a population across generations, not merely the condition of one individual. A variation that improves survival or reproduction can influence evolution only when it is transmitted to offspring. If the variation is not inherited, it disappears when the individual dies and cannot become more frequent in the population. Therefore option A is correct; digestion and chromosome destruction are unrelated to this requirement.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Heredity and Evolution.
Student feedback
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
