A scientist is studying the relative age of divergence of two plants, using a gene encoding for an important sub-unit of photosystem II. He finds that the two plants have 20 nucleotide differences. He then comparatively studies the same gene from two more plants and finds they have only 2 nucleotide differences. The two earlier plants therefore have a common ancestor that is how many times older than the second two?
A) Two times older
B) Five times older
C) Twenty times older
D) There is insufficient evidence to determine how much older the first pair of plants is
E) Ten times older

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The Answer of A scientist is studying the relative age of divergence of two plants, using a gene encoding for an important sub-unit of photosystem II. He finds that the two plants have 20 nucleotide differences. He then comparatively studies the same gene from two more plants and finds they have only 2 nucleotide differences. The two earlier plants therefore have a common ancestor that is how many times older than the second two?
A) Two times older
B) Five times older
C) Twenty times older
D) There is insufficient evidence to determine how much older the first pair of plants is
E) Ten times older

A Scientist Is Studying the Relative Age of Divergence of Two