What are the two distinct categories into which all the components of an is fall?

Dna replication or repair occurs in a cell in all of thw following situations except when

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

What factors contribute to the effect an environmental toxin has on the human body?