How can overfishing lead to ecosystem collapse?

a. reducing fish populations reduces sediment flow to the oceans.
b. reducing the fish population also removes the fish and mammals that eat them.
c. fish have reached their carrying capacity.
d. fish are a source of biomass, which is a major source of energy in the united states.

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.

What will happen if two of the base pairs of the stand of the dna are switched

The wind is to parities grasses because it them