Under which of the following circumstances would the allele frequencies of two populations be very different?
O A. If there is a large amount of gene flow
B. If the selective pressures are different
C. If the populations have healthy reproductive rates
O D. If there is a large amount of genetic drift

Why are carbon dioxide concentrations expected to increase? a carbon dioxide concentrations are expected to increase, because fossil fuel burning is expected to increase b. carbon dioxide concentrations are expected to increase, because of an increase in agriculture. c.carbon dioxide concentrations are expected to increase, because more land will have to be cleared for increasing populations and agricultural use. d. all of the above select the best answer from the choices provided mark this and return save and exit next submit submit