When an individual muscle fiber receives a threshold stimulus, it contracts as much as possible. ... a threshold stimulus is the minimum amount of energy needed to make a muscle fiber contract.
Answer:
dont really got an answer for that
the answer is D.he conversion of restaurant grease to bio-diesel fuel for use by motorists.
Vitamins are organic substances because you get your vitamin D from the sun and the sun is not artificial is it. So that is false
