Gce Model Questions Vol1 2020 Biology Question 1

Practice objective / multiple choice question 1 from the 2020 Gce Model Questions Vol1 Biology examination.

Gce Model Questions Vol1 2020 Biology Objective / Multiple Choice Medium Difficulty
Question 1 GCE_MODEL_QUESTIONS_VOL1 • 2020 • BIOLOGY • objective

A molecular clock for a group of mammals ticks at a rate of 1.5 substitutions per million years per 2000 base pairs. For the lineage leading to species O the rate is 20 % faster. The observed genetic distance between species M and N is 9 substitutions per 2000 bp, and between N and O is 12 substitutions per 2000 bp. Using these data, determine which divergence (M-N or N-O) occurred earlier and by how many million years (to one decimal place).

Answer Options

A. N-O diverged earlier by 0.5 million years
B. N-O diverged earlier by 1.0 million years
Correct Answer C. N-O diverged earlier by 0.7 million years
D. M-N diverged earlier by 0.7 million years
Correct Answer
C
Correct Option:
N-O diverged earlier by 0.7 million years

About This Question

This is Gce Model Questions Vol1 2020 Biology Question 1. It is one of the objective questions from the 2020 Gce Model Questions Vol1 Biology examination.

Difficulty level: Medium .

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