Observe: Put two Elodea sprigs into a test tube. Put the O_ICO, probe into the tube with the Elodea. Click Play. As the Gizmo runs, Pause (1) it a few times.
I
A. How do the oxygen () and carbon dioxide
(CO) levels change over time?
B. What is always true about the total amount of Oz
and Co, in the test tube?
c. What happens when the CO, reaches zero?

According to your text, should be in the native language of the parents or guardians whenever possible. a. an email b. consent forms c. oral approval d. storybooks loaned out

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

Can nonrenewable resources be used sustainably?