a negative control is a simple that you will give you a negative result. you are testing for the presence of proteins simple sugars starch and lipids in various foods what would be the best negative control 1. artificial cytoplasm , because it is good buffer 2. a solution contains protein , sugar, starch, but no lipids 3. candy because it has no nutritional value 4. distilled water because it does not contain any of the molecules you are tasting for

it's diluted or concentrated

in a diluted solution, you can add a lot more solute but in concentrated only a little more can be added

for example, no new evidence will demonstrate that the earth does not orbit around the sun (heliocentric theory), or that living things are not made of cells (cell theory), that matter is not composed of atoms, or that the surface of the earth is not divided into solid plates that have moved over geological timescales .

because photosynthesis could not occur (apex)