In science writing, what is the purpose of historical points of reference? to help readers connect prior knowledge to new discoveries

to help readers sympathize with past scientists

to help readers understand an especially difficult concept or idea

to help readers understand the complete history of a scientific idea

Which of the following is not a food produced in rainforests? a) coffee b) cocoa c) avocados d) wheat

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 factor is difficult to assess in a cost-benefit analysis