Answer:
a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.
Explanation:
Answer:
Some transport requires energy.
Not all materials that move in and out of a cell can do so by diffusion. For cells to carry out life functions, materials must often move from areas of low concentration into areas of high concentration. This process of moving materials against a concentration requires energy.
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The answer is c because dopamine helps the body deal with pain and reduces symptoms because of that fact.
The engine in a vehicle is not powered by the carbon it produces
