Which best describes a centromere? sister chromosomes that are held together by a chromatid paired chromosomes that have genes arranged in the same order the part of a chromosome that joins the sister chromatids the material that makes up a chromosome

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)