The solar energy received at each area of the Earth is not the same. This is the driving force for the Earth's .
A.
rotation
B.
winds
C.
tilt
D.
tides

Which of the following factors would not contribute to allopatric speciation? a) a population becomes geographically isolated from the parent population.b) the separated population is small, and genetic drift occurs.c) the isolated population is exposed to different selection pressures than the ancestral population.d) different mutations begin to distinguish the gene pools of the separated populations.e) gene flow between the two populations is extensive.