What is happening to the visible light waves as they come into contact with bricks and what characteristics determine the behavior of the light waves

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

Which direction does the energy flow in this energy pyramid ?

Describe the two types of vascular tissue