Using a compound microscope, jorge is able to see a single celled organism that is moving rapidly in the field of view. he can just make out one, long, whip-like structure that is undulating back and forth. jorge has just identified: select one: a. cilia b. spindle fibers c. a flagellum d. chromosomes

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