Gce Model Questions Vol1 2019 Biology Question 23
Practice objective / multiple choice question 23 from the 2019 Gce Model Questions Vol1 Biology examination.
A simplified phylogenetic tree for four species is described as follows: from the root, branch to species D is 15 million years (My). The other branch from the root leads to a node that is 7 My from the root; from this node, branch to species C is 12 My (from the root) and a further node splits into species A and B, each 5 My from that node.\n\n(a) Which two species are most closely related?\n(b) What is the total evolutionary distance (in My) between species A and species C?
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This is Gce Model Questions Vol1 2019 Biology Question 23. It is one of the objective questions from the 2019 Gce Model Questions Vol1 Biology examination.
Difficulty level: Medium .
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