Why do giant sequoia trees grow

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.

Which is the layer underground where all empty spaces are filled with a combination of air and water ?

Label a-f based on the table using c for concentrated and d for dilute