What's a world problem that could be solved with science?

Which level of consumer had access to the smallest apply of energy

What organ is the first to receive nutrients that have been absorbed from the digestive tract?

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.