The answer is body's physiological reaction to any demand that is placed on it
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Hans selye describe a stress as responses of the body to any changes of demand. The response of the body to the demand could be harmful as it could lead to some disease like stomach ulcer. It is important to know what your stress source and manage it before the stress start to harm your body.
It's the <span>chloroplast.
Hope this helps !
Photon</span>
We are learning about that in my cell biology class.a cytoskeleton is like your muscles because it can contract like muscles which gives the cell shape,strength,and make it divide.
the answer is differentiation
An example is a radio wave