Biology · Genetics and Evolution
Given below are statements on concepts related to genome evolution: A. Presence of introns in some chloroplast genes suggests that endosymbiosis occurred before loss of introns in prokaryotes and supports the hypothesis that genes originated as interrupted structures. B. Negative selection is associated with an increased rate of nonsynonymous substitutions as compared to synonymous substitutions. C. Nucleotide substitution rates during evolution can be inferred from divergence of sequences that are non-functional or neutral. D. Positive selection is associated with an increased rate of nonsynonymous substitutions as compared to synonymous substitutions. Which of the following options represents a combination of all INCORRECT statements?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1A and C only
- 2B and C only
- 3A and B only✓
- 4C and D only
Correct answer
A and B only
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