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What is a cell and why do we need them?

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Cells are the basic building blocks of all living things. The human body is composed of trillions of cells. They provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions.
User Sarge
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Answer:

Cells are the building blocks of life that produce Carbon Dioxide and energy that is in the form of ATP

Step-by-step explanation:

User Luca Bernardi
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