Help biology question pleas!?

Question

what are the five principal evolutionary forces?

Answer 1

the five principa evolutionary forces : mutation , gene flow , nonrandom mating , genetic drift , and natural selection. ( this will help )

Answer 2

As an evolutionary biologist, I'm confused by what you're getting at. We don't talk in terms of forces...

However, I see that some do use that terminology in a casual sense. For four such "mechanisms of change" involved in evolution, see:

http://evolution.berkeley.edu/evosite/ev...

Specifically, evolution can result from various combinations of the following:

mutation, drift, gene flow, selection

If you're desperate for a fifth, some folks would add recombination to such a list.