Answer:
D
Explanation:
because air is made up of nitrogen,carbon dioxide, Argon and oxygen
Carbohydrates are an important type of FOOD MACRO MOLECULES.
Food macro molecules refers to the small chemical sub units of molecules which are found in food. There are four major food macro molecules, they are carbohydrates, proteins. lipids and nucleic acids.
Carbohydrate is an important source of fuel for the biological system.
Answer:
B
Explanation:
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