Which of the following illustrates conduction as it’s made of heat transfer? a. a microwave oven produces electromagnetic waves that transferred to the food form of heat. b. leaving a metal spoon in a bowl of hot soup will make the spoon hot as well. c. pasta rises and falls with the current of boiling water or d. a campfire emits light waves which in turn transfers heat to objects.

B) leaving a metal spoon in a bowl of hot soup will make the spoon hot as well.

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.