Pls answer this guys

The chemical form of energy that is useable by the cell to do work

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

The most famous fossil called archaeopteryx is which of the following? a dinosaur a fern a fish a bird