How can the absence of wolves affect elk population

The picture shows a fishing technique called trawling. how might trawling affect marine biodiversity

Describe the relationship between isotonic solutions, equilibrium, and water movement into and out of a cell.

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.