Why did Neanderthals evolve to have a wider, stockier body shape? a. because they were bipedal
b. because they spent their life in trees
c. because they migrated to Europe with a colder climate
d. because they stayed in Africa with a warm, dry climate

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.