In parts of the United States male deer now become reproduct

In parts of the United States, male deer now become reproductively mature 1-2 years earlier and with smaller antlers than recorded historically.You compare DNA extracted from recently collected deer antlers to DNA from deer antlers collected 150 years ago. You discover that, in addition to the size of antlers becoming smaller over time, the genetic composition of deer populations has shifted considerably over this period. What might you conclude from this observation?

Question 8 options:

All of the answers are correct

evolution has occurred

current deer would have been unable to breed with deer from 150 years ago

reproductive incompatibility has developed

sympatric speciation has occurred

Solution

the size of antlers becoming smaller and smaller . And then they make a new species so , it is obvious that a genetic polymorphism has been occurred, which in turn isolate deers from antlers , so right option is sympatric speciation has occurred.