When comparing the sequences of a homologous gene in four different species, one pair of species shows a 1% difference, whereas the other pair shows a 3% difference. Which pair diverged longer ago from their common ancestor and why?
A. The pair with a 1% difference? a smaller difference (1% instead of 3%) indicates that there has been more time to accumulate mutations.
B. The pair with a 3% difference? a larger difference (3% instead of 1%) indicates that there has been more time to accumulate mutations.
C. The pair with a 3% difference? A larger difference (3% instead of 1%) indicates that there has been less time to accumulate mutations.
D. The pair with a 1% difference? a smaller difference (1% instead of 3%) indicates that there has been less time to accumulate mutations.
Answer: B
You might also like to view...
The ___ takes up HDLs and uses them to make
___.
a. liver...bile b. small intestine...bile c. red bone marrow...platelets d. yellow bone marrow...fat e. liver...LDLs
In humans, the male determines the sex of the child because males have
A) one X and one Y chromosome. B) two X chromosomes. C) 46 chromosomes. D) two Y chromosomes.
If two parents with short fingers (dominant) have a child with long fingers, what is the chance their next child will have long fingers?
a. There is no chance. b. 1/16 c. 1/2 d. 3/16 e. 1/4
Where in a prokaryotic cell does oxidative phosphorylation occur?
a. Outer membrane of the mitochondria b. Inner membrane of the mitochondria c. Inner part of the cell membrane d. Throughout the cytoplasm