Classification of all known living organisms

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 to produce involved from a symbiotic relationship of organisms which resulted in eukaryotic organisms contain chloroplast

What are the three different shapes or structures shapes or structure of carbon-based molecules?