The science of using treevtings to determine absolute age is called

Nucleic acid certain protein cell membranes certain carbohydrates

In which layer do organisms on earth love?

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.