Neco 2021 Biology Question 25
Practice objective / multiple choice question 25 from the 2021 Neco Biology examination.
A simplified cladogram shows four species (A, B, C, D). The branch lengths (in million years) from the most recent common ancestor to each species are: A = 6 My, B = 8 My, C = 10 My, D = 12 My. The branch that joins the ancestor of A and B to the root is 4 My, and the branch that joins the ancestor of C and D to the root is also 4 My. Assuming a molecular clock, answer: (a) which pair of species shares the most recent common ancestor? (b) Estimate the time (in million years) since the divergence of that pair.
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About This Question
This is Neco 2021 Biology Question 25. It is one of the objective questions from the 2021 Neco Biology examination.
Difficulty level: Medium .
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