Which of the following is a benefit associated with the use of energy producing technologies excluding the burning of fossil fuels? a. reduced water use b. reduced air pollution c. reduced habitat loss d. all of the above

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