What is true of nad in cellular respiration? choose 1 a nad carries excess carbon dioxide out of the cell. b nad carries the oxygen needed to break down the glucose molecules into the cell. c nad carries and transfers electrons and h+ ions. d nad is used to directly break apart the glucose molecules.

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.