Waec Model Questions Vol1 2018 Biology Question 27
Practice objective / multiple choice question 27 from the 2018 Waec Model Questions Vol1 Biology examination.
Consider the phylogenetic tree described: The root splits into two lineages. From the root to lineage A is a branch of 5 million years (My). Lineage A further splits into species X (branch length 3 My) and species Y (branch length 2 My). From the root to lineage B is a branch of 7 My. Lineage B splits into species Z (branch length 4 My) and species W (branch length 1 My). What is the total genetic distance (in My) between species X and species Z?
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About This Question
This is Waec Model Questions Vol1 2018 Biology Question 27. It is one of the objective questions from the 2018 Waec Model Questions Vol1 Biology examination.
Difficulty level: Medium .
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