Which stage is the last stage of speciation?

a) the populations become totally separated from one another.

b) the populations interbreed successfully.

c) the populations are isolated and thus do not interbreed.

d) the population become adapted to different environments and eventually become so different that they cannot interbreed to produce fertile offspring.

How is anaerobic respiration affected by changes in temperature? (5 points)based on the conditions of early earth, what conclusion can you draw about the amount of anaerobic respiration that was occurring at earth’s beginning? explain your answer.(5 points)if there was a sudden drop in temperature after the evolution of the first living cells, predict how that might have affected the changes in the atmosphere and the evolution of cyanobacteria and other autotrophs. explain your answer. (5 points)