Why does the chair in which you are currently sitting retain its same shape over time?
question options:
the particles of the chair are strongly held together.
the chair is lower in energy than the surrounding environment.
the particles of the chair are free to move and form their most stable positions.
the chair is made of particles that are relatively far apart and spread out to a maximum to form the chair shape.

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.