Which best describes a theory?
a. an educated guess
b. an untested claim
c. a well supported conclusion
d. a proven fact

What do isotopes of uranium have the same number of? what do they have a different number of? a) same number of protons; different number of electrons b) same number of protons; different number of neutrons c) same number of electrons; different number of protons d) same number of neutrons; different number of protons

Which label identifies the part of the atp molecule that changes when energy is released in the cells of all living things

How do all types of diffusion/passive transport actually ‘work’ without using even the smallest amount of cellular energy?