Which of the following structures: make energy for the cell

Several billion years ago which gas was the least prevailant in the atmosphere

Amines amides and amino acids are categories of

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.