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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: syllabus Science, Ch 9 'Heredity and Evolution'_
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