If there is 37% of cytosine in a molecule of double-stranded DNA, what percentage of guanine is present? A.) 63%
B.) 40%
C.) 37%
D.) 60%

What is hydroelectric power produced by?

Photosynthesis converts solar energy into what type of energy?

Use the drop down menus to match each example to the fossil topic discussed then to show how the fossil record gives evidence of evolution