The chief limiting factor to the success of most trout species is a. the ability to reproduce. b. the dissolved oxygen content in water. c. the amount of plant biomass. d. All of these are correct.

What element is able to combine with itself and hydrogen to form large molecules ?

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.

Si units are the modern form of the