What are three chemicals are body is made of?

Which of the following is an example of this type of co-evolution

Nucleic acid certain protein cell membranes certain carbohydrates

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