Which two processes cycle carbon directly between the atmosphere and biosphere?

What the theory that the sun goes around earth was replaced with the theory that earth goes around the sun this was an exaple of a

Select the correct answer from each drop-down menu proteins are

Cathy hypothesized that corn would not grow in mud. to test this hypothesis, she took corn kernels and placed 5 in mud, 3 in soil, and 2 in water. to her surprise, the kernels in the mud grew faster than the kernels in the soil. what error might have caused these unexpected results? a. wrong hypothesis b. not enough variables c. undefined control d. too many variables