During exercise, why is the oxygen concentration in arterial blood different from the oxygen
concentration in venous blood?
asap ! : )

How does buring fossil fuels impact does carbon cycle? what large impact does this have on the envirnment?

This group of organisms perform the process of ammonifcation. a. herbivores b. decomposers c. carnivores c. plants

Sarah and john are having a discussion on genetic diversity. sarah believes that it happen over a long period of time. john it happens immediately. who is correct? a. sarah is correct because genetic diversity occurs over a long period of time. b. john is correct because genetic diversity occurs immediately. c. both are correct because genetic variation can occur or long period of time. d. neither are correct because genetic diversity occurs over any period of time