Variants are selected in a population by:
AEnvironmental factors
BEducational factors
CEmotional factors
DEditorial factors
Answer & Solution
Correct answer: A. Environmental factors
1. Not all variations have an equal chance of surviving.
2. Bacteria that can withstand heat survive better in a heat wave.
3. Selection of variants by environmental factors forms the basis for evolutionary processes.
_Source: NCERT Class 10 Science, Ch 9 'Heredity and Evolution'_
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