Which statement about a compound on this ph scale explains why it is a base?
a. rboh is a base because its ph is greater than 7.
b. hcl is a base because it is the lowest number on the ph scale.
c. hio3 is a base because its ph is closest to 7.
d. hbr is a base because its ph falls between 1 and 7.

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)