1. Over many years winters in a particular region become increasingly colder. As a result, food becomes less available. Which of the following adaptations would
BEST help an animal species survive both of these changes?

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.