Unique to primary growth is the fact that it

a. increases the thickness of the stems. b. occurs in the cork cambium. c. lengthens the height of the stems. d. takes place in the vascular cambium.

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