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Continuity of life on Earth — Question 117

Original QCE Vault practice · 1 mark

Q117 · Practice questionComplex familiar1 mark

QUESTION 117

The phylogram shows three species. Horizontal lengths represent sequence differences; vertical spacing has no scale. What is the total sequence difference along the path joining species A and B?

Biology diagram for BIO26-ORIG-117
(A)
3 units
(B)
9 units
(C)
13 units
(D)
5 units
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