During cellular respiration, what is the direct source of the energy used in the cells of consumers in the

ecosystem represented below?

A) the sun

B) enzymes

C) the atoms making up inorganic molecules

D) the chemical bonds in organic molecules

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.