They use them as food and habitats.
Water. the only 4 macromolecules are nucleic acid, carbohydrate, lipids, and protein
Answer:
The first step in the Scientific Method is to make objective observations. These observations are based on specific events that have already happened and can be verified by others as true or false. Step 2. Form a hypothesis.
Explanation:
Retinol is the form of vitamin A that causes the greatest concern for toxicity.
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