Answer:we have a lot
Explanation: WE HAVE BACK PAIN. The birth of bipedalism was a high point in human evolution.
WE HAVE WEIRD APEY FEET.
CHILDBIRTH IS TRICKY.
WE CRAVE JUNK FOOD.
A LOT OF US HAVE MENTAL ILLNESS.
OUR THIRD MOLARS ARE A PAIN.
Answer:
Darwin's main contribution to the theory of evolution was his theory of natural selection.
Explanation:
Natural selection is the phenomenon that some organisms from a particular population fit better into their environment, that is, are more likely to provide surviving offspring than less well-adapted organisms. The best adapted organisms will increasingly gain the upper hand within the population (survival of the fittest). It is thus one of the mechanisms of evolution. Mutations in, and recombinations of, the genetic material of the organisms cause the genetic variation in the population, allowing this selection.
So that they can use them as primary sources to find out the most accurate facts
