Water is less dense as a solid than as a liquid. how does this property typically affect a lake ecosystem in freezing temperatures?

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.

Which of these definitions have been paired with the correct type of cell?

Agland that serves both the digestive and the endocrine systems is called