What is the disadvantage of using models to study the food web? Observations are made from inside the system.
Actual interactions are affected by the models.
They cannot show all the interactions taking place.
They cannot help in making predictions about a population.

and please explain for brainliest.

carbohydrates: (starches and sugars) composed of carbon, hydrogen, and oxygen.

lipids: (fats, oils, and waxes) are made of carbon and hydrogen atoms.

nucleic acids: contain hydrogen, oxygen, nitrogen, carbon, and phosphorus. they are polymers of nucleotides. a nucleotide has three parts, a 5-carbon sugar, a phosphate     (-po⬇️4) group, and a nitrogenous base.

proteins: made up of nitrogen, carbon, hydrogen, and oxygen. they are polymers of amino acids.

answer; ///i believe the correct answer is (aids) acquired immune deficiency syndrome;

a lot of people sadly don't know the best way to learn is cheating off of your friends or this amazing thing called google