What has to happen befor a cell can divide? A: DNA has to double
B: DNA has to unwind
C: Chromosomes need to form
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

Which is the graph of the piecewise function f(x)? f(x) = image for option 1 image for option 2 image for option 3 image for option 4

How do all types of diffusion/passive transport actually ‘work’ without using even the smallest amount of cellular energy?