34. Over the last ten seconds of his walk Jim increased his velocity from 2 m/s north to 6 m/s north to cross the street before the light changed. What was Jim's acceleration?

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.