Please answer this ill give the brain thing but i need a answer QUICK!

What are the four basic classes of organic molecules how do they differ structurally and functionally

Adoctor is trying to diagnose a patient with dry skin. which of the following resources would be the most ? a magazine ad about soft skin a growth chart online articles about dry skin medical books

The united states produces an average of 429 billion pounds of food annually. about 133 billion pounds of that food ends up as waste. the percentage of food that the united states wastes each year is %.