Answer: They compare the number of mutations to determine how long ago species separated and evolved.
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Answer:
On a graph, points are grouped closely together.
I only put one answer because the choices repeat.
A star's apparent brightness<span> is its </span>brightness<span> seen from Earth. A star's </span>absolute brightness<span> is the </span>brightness<span> the star would have if it were at a standard distance from Earth
</span>so if your riding in a car at night and your passing some one on the road in there point of view your apparent brightness is lets say 10 and if your are farther a way your estimated brightness or star's absolute brightness would be 10.<span />
