All the living (biotic) and non-living (abiotic) factors in a community are called a(n)

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.

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Babies with very low or very high birth weight are less likely to survive. observe a graph of the data.