Waec Model Questions Vol1 2017 Biology Question 49

Practice objective / multiple choice question 49 from the 2017 Waec Model Questions Vol1 Biology examination.

Waec Model Questions Vol1 2017 Biology Objective / Multiple Choice Medium Difficulty
Question 49 WAEC_MODEL_QUESTIONS_VOL1 • 2017 • BIOLOGY • objective

Two species show 12 nucleotide differences per 1000 bp in a homologous DNA segment. Assuming a neutral mutation rate of 2 × 10⁻⁹ substitutions per site per year, estimate the time since the two species diverged. Based on this molecular evidence, discuss whether their similar morphology is more likely due to common ancestry or convergent evolution.

Answer Options

A. Divergence time ≈ 9×10⁵ years; similarity most likely reflects convergent evolution
B. Divergence time ≈ 1.2×10⁶ years; similarity most likely reflects convergent evolution
Correct Answer C. Divergence time ≈ 3×10⁶ years; similarity most likely reflects common ancestry
D. Divergence time ≈ 6×10⁶ years; similarity most likely reflects common ancestry
Correct Answer
C
Correct Option:
Divergence time ≈ 3×10⁶ years; similarity most likely reflects common ancestry

About This Question

This is Waec Model Questions Vol1 2017 Biology Question 49. It is one of the objective questions from the 2017 Waec Model Questions Vol1 Biology examination.

Difficulty level: Medium .

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