How do you know what a plant cell is?

What feature of cell theory is best demonstrated in the image

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

Which anatomical plane is the only one that could not show both the sternal region and vertebral region