During a chemical reaction can only 1 substance be produced? why or why not

Imagine that you have produced several versions of lactase, each of which differs from normal lactase by a single amino acid. describe a test that could indirectly determine which of the versions significantly alters the three-dimensional shape of the lactase protein.

Llama have 74 chromosomes how many chromosomes will they be found in their gametes explain how you know

An empty fuel tank can still contain and therefore can be even more dangerous than one full of liquid fuel.