Sarah is researching the indigenous plant and animal populations around her city. She has identified one area that is home to some very rare
species. How could she preserve the land for future generations?
A
campaign against future construction
B. apply for National Wildlife Refuge status
C. raise funds to build a fence around it
D. ask a developer to buy the land

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.