Arks) 1. How do the levels stay balanced as a constant percentage? Explain in terms of gas exchange in photosynthesis and cellular respiration.

What is the 77 element on the periodtic table

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

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