8. Which of the following shows an example of extinction? A: Two species of caterpillars compete for the same food
B: Two species of caterpillars breed to create a new species
C: A generation of caterpillars all metamorphosize into butterflies
D: An entire species of caterpillar dies off

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.