Lipids may consist of fatty acids alone, or they may contain other molecules as well, and bacteria are capable of growth on fatty acids and lipids. Given these facts, what can bacteria grow on among the following options: - fatty acids - swamp vegetation - Most plants - vinegar - amino acids - calories - protein - loose dirt
fatty acids

Mammals generate heat mainly by keeping their metabolic rate high, and and resting metabolic rate is a big contributor to calories burning. Given these facts, mammals generate heat mainly by what among the following options: - hugging mammals - calorie counting - with their fur - energy of moving objects - burning calories - sweating - selling fur coats - flow of electrons
burning calories

Evaporation can be used for separating a solute from a solvent in a solution, and energy in the form of heat causes evaporation. Given these facts, what can be used to separate a solute from a solvent in a solution among the following options: - bandaid - Gas - table - sodium - energy - heat - frost - vapors
heat

Antigens are molecules that the immune system recognizes as foreign to the body, and an antigen is a molecule of carbohydrate or protein. Given these facts, what are molecules that the immune system recognizes as foreign to the body among the following options: - Foreign country. - Carbohydrates, or proteins. - microorganisms - Something that causes allergies - Molecular structure. - Operating system. - sub-units of species - Organic compounds
Carbohydrates, or proteins.