Organisms that provide an early warning of environmental damage are: question 10 options: endemic species. endangered species. threatened species. bellwether species. commercial species.

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 hormone is used by both males and female?

Why are current extinctions of concern to enviromentalists?