What is the function of the small, dark organelles labeled e? a. they contain enzymes for the digestión of old cell parts. b. they regulate what enters and leaves the cell. c. they assemble animo ácids into proteíns. d . they store water and other materials.

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.