When lactose is not present, what happens to E. coli is that the genes that produce the enzymes needed to break down lactose are not expressed. The correct answer is B.
As a substance absorbs heat the particles move faster so the average kinetic energy and therefore the Temperature increases. Temperature is a measurement of the average kinetic energy of the molecules in an object or system.
Explanation:
Porosity depends on the size, shape, and mixture of grains and particles that compose soil and rock. For instance, small particles such as clays can compact more closely together, reducing the amount of porosity. However, larger particles such as sand and gravel will have more spaces available between them.
