The only type of microscope which requires no specimen prep is the…?

a. scanning electron scope
b. compound light scope
c. stereo ( dissecting) scope
d. transmission electron scope

Can someone i have no idea of how to do this.

Which greenhouse gas is emitted when burn fossil fuels for energy? a. nitrogen b. oxygen c. carbon dioxide d. helium

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.