Maintaining a certain calcium concentration is important for the proper functioning of which cells? Check all that apply.

a adaptation is when organism changes itself to fit the environment

ex. when its cold outside i wear a jacket

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mountains can affect the climate of nearby lands. in some areas, mountains block rain, so that one side of a mountain range may be rainy and the other side may be a desert. much of airborne moisture falls as rain on the windward side of mountains.

explanation: