Which of the following are primarily responsible for the sense of touch? a. the circulatory system and the skin b. the circulatory system and the digestive system c. the nervous system and the circulatory system d. the nervous system and the skin

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)