Igcse Model Questions Vol1 2019 Biology Question 4
Practice objective / multiple choice question 4 from the 2019 Igcse Model Questions Vol1 Biology examination.
Two closely related bird species differ in their mitochondrial DNA sequences at 12 % of nucleotide positions. Species A has a molecular‑clock rate of 2 % divergence per million years, whereas species B evolves twice as fast. Assuming the rates have been constant since the two species diverged, estimate the time (in million years) since their most recent common ancestor.
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This is Igcse Model Questions Vol1 2019 Biology Question 4. It is one of the objective questions from the 2019 Igcse Model Questions Vol1 Biology examination.
Difficulty level: Hard .
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