When one observes the phase of matter, one observes a ___ property of matter.

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.

This is the nitrogenous base only found in rna

Which of these definitions have been paired with the correct type of cell?