What is the atomic mass of
an atom?
A. the total number of protons plus
neutrons
B. the total number of protons
c. the total number of neutrons

What initially causes a nerve impulse? release of enzymes out of the neuron movement of chemicals into the dendrites of the neuron pathogens attacking the dendrites of the neuron red blood cells bathing the neuron

What are the two main phases of a cell cycle

Which list is in order from simplest to most complex? a bacteria - virus - plant - protist b protist - bacteria - virus - plant c virus - bacteria - plant - protist d virus - bacteria - protist - plant