Living cells contain numerous enzymes that constantly scan dna, searching for damaged or incorrectly paired nucleotides. when detected, these defects are corrected by: a. ligase b. dna polymerase c. dna repair enzymes d. rna polymerase e. dna scanning enzymes

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.