alleryEvolution is best defined as the change occurring in living organisms that takes place:
ASuddenly within a few hours
BOnly inside a single cell
COnly during one lifetime
DGradually over a long duration
Answer & Solution
Correct answer: D. Gradually over a long duration
1. Evolution refers to changes in living organisms over generations.
2. These changes are slow and develop over a very long duration.
3. So evolution is gradual change over a long period.
4. It is not a sudden change within hours, so that option is ruled out.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 1 "Heredity and Evolution", p.12_
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