The wing of a bird and the leg of a horse are very different looking structures. although they look different, bird wings and horse legs are very similar in the arrangement of the bones that make up the limb. which term is used by scientists to describe structures that look different on the outside but are actually similar in construction and develop from the same embryonic tissues?

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.