Natural selection may affect allele frequency in populations due to the fundamental forces of evolution except which of the following?
O gene drive
O gene flow
O genetic drift
O mutation

Which of the following is a cost of urbanization? a-cities can provide a high standard of living. b-cities are hubs of entertainment and education. c-paving over land changes the environment. d-job opportunities are greater in urban centers.

The deserts of the sahara and australia are associated with

The first signs of cellular differentiation occur in the blastocyst. why is cellular differentiation important for the development of a fully formed human infant?