Activation energy is
-the energy lost or gained in a reaction.
-required to convert an endergonic reaction to an exergonic reaction.
-the energy required to bring molecules into a position where they can interact.
-the energy required for an endergonic reaction.

Aneuron is stimulated with an electric pulse. the action potential is detected at a point 3.70 cm down the axon 0.0052 s later. when the action potential is detected 7.20 cm from the point of stimulation, the time required is 0.0063 s. what is the speed of the electric pulse along the axon? (why are two measurements needed instead of only one? )

How do cells grow and reproduce to maintain homeostasis?

For this question look at the hydropic diagram water that is heated by the sun evaporates. select the number that represents it.