What is the starch indicator, and how does it change?

The transport tubes from food came down the plant are called?

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

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