What occurs when a light wave enters a substance and its speed suddenly slows down?

Select the word from the list that best fits the definition a system made of 25 satellites

Describe the relationship and movement between temperature and density in a convection cell. make sure you identify the direction of travel

Lactase is essential for digesting lactose in milk. this enzyme is specific for this sugar. why? molecules and active sites vary in size; only properly sized molecules can fit. there is a precise compatibility between the active site and the lactose molecule. specificity refers to the action of the enzyme, such as hydrolysis, and relatively few molecules can be hydrolyzed. reaction-specific enzymes assume a fit by folding around the most numerous substrate molecules.