Neco Model Questions Vol1 2024 Biology Question 13
Practice objective / multiple choice question 13 from the 2024 Neco Model Questions Vol1 Biology examination.
A simplified phylogenetic tree shows three species X, Y and Z. The branch length from the common ancestor to species X is \(4\ \text{My}\). Species Y and Z share a more recent common ancestor that lived \(2\ \text{My}\) ago; from that node each lineage extends another \(4\ \text{My}\) to reach Y and Z respectively. Assuming branch lengths are proportional to time, which pair of species are most closely related, and what is the total divergence time between that pair?
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This is Neco Model Questions Vol1 2024 Biology Question 13. It is one of the objective questions from the 2024 Neco Model Questions Vol1 Biology examination.
Difficulty level: Medium .
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