How do the electrons in photosynthesis gain energy?
a. they use energy in the form of glucose.
b. they take energy from atp molecules.
c. they use energy from a hydrogen ion pump.
d. they absorb photons.

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