An atom is composed of protons, electrons, and neutrons. what is the electric
charge on the proton?
0
+2
+1
-1

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

The carrier molecules of the electron transport system are located in the

Which characteristics must an object possess in order to be considered alive?