The gases that surround the earth make up the

cryosphere
hydrosphere
biosphere
atmosphere

Stephen is a student who wants to test his knowledge of medical terminology. which option could he use?

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.

Which diagram best represents the chromosomes that would be found in a two new skin cells produced as a result of this process?