Which statement best explains why the development of a new area of science can lead to changes in a theory? a. a new area of science attracts new scientists who study old theories for flaws. b. a new area of science promotes experimentation from a different point of view. c. a new area of science allows old theories to be reworded using new terminology. d. a new area of science encourages scientists to replace old theories with modern ones.

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.