Question 4: Suppose there were changes in the habitat that caused this actual value. What might a combination of those changes be?

In the respiration-photosynthesis cycle shown above, what are the products of cellular respiration that belong in box 2?

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.

Cells must be in osmotic equilibrium with their surroundings environments because if they swell or shrink thier membranes will rupture