Which of the following examples likely occurred through natural selection?

Question

anonymous · Answer

A Giraffes have longer necks than their ancestors.
B Some humans have hair on the middle part of their fingers, while others do not.
C 

In a litter of puppies, some puppies have brown fur while others have black fur.

zehanz · Answer

Please ask this question in the Biology section...
(BTW what do you think is the right answer?)

anonymous · Answer

B ? and I KNOW NOONE ANSWERS ME IN THE BIO

anonymous · Answer

@ZeHanz

anonymous · Answer

your still typing

zehanz · Answer

I think it is A, because of this: random changes in offspring causes some giraffe babies to have shorter necks and some longer.
The ones with the longer necks are better fitted to reach for the leaves on the higher branches. Therefore, they have a bigger chance to get babies themselves. So the ones with longer necks are more likely to survive. The new generation generally resembles the current one, so they will in general also have longer necks.
In this way, after a few generations, a larger fraction of the population of giraffes will have longer necks.

anonymous · Answer

yes it was A great job and thanks for the help

zehanz · Answer

YW!