<span>Some of the things that would make the experiment invalid would be, if there was a variation in the behavior of the class with respect to food - for example, if some people ate their breakfast earlier than the others. This then would mean that some students would have already digested their breakfast during the morning classes and the others would still be digesting. </span>
The answer is c, because a compound is two substances combined chemically and a mixture is not
I can’t see it vary well :(
Cell Theory #1: Cells are the basic structure and function of a living thing.
Cell Theory #2: All organisms (living things) are made out of cells.
Cell Theory #3: Only existing cells can make new cells.
D. Genes. They have genetic material that determine our characteristics.
