Question

Do environmental factors control species population

Answer 1

Yes, the answer is yes...
As environment differs from one region to another region...
Some areas gives a very warm feeling and some are very cold regions..
Body resistance power also differs...

And there is function of gene, environment also causes gene mutation sometimes...

See na skin colour of Indians differ from Americans due to this environmental variation inspite of both belong to same species that is Homo sapiens.. So here we concluded it's a big yes