Why won’t the smallest unit of space and time ever be found?

Why do cells appear different in distilled water than they do in 10% salt water?

Which describes fat? a: a carbohydrate that produces energy b: a nucleic acid that directs cell function c: a lipid that stores energy d: a protein that speeds up a chemical reaction

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled