Answer:
A. amino acids
Explanation:
Protein in our diets comes from both animal and vegetable sources. ... The digestive system breaks all proteins down into their amino acids so that they can enter the bloodstream. Cells then use the amino acids as building blocks to build enzymes and structural proteins.
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An experiment that is conducted within a controlled environment is known as a controlled experiment, similar to a controlled variable.
Answer:
The total amount of matter on Earth constantly increases.
Explanation:
This is because there are always new things taking birth every second and they have matter in them, so the matter is increasing constantly.
Natural indicators are important because they relate information about the acidity or alkalinity of a substance by demonstrating a shift in color which inform the observer about the pH level of the concerned material.
Natural indicators possess useful chemicals which relate information about pH level and because of this they are used in manufacturing of chemical indicators.<span />
