You accidentally slept in and had to jog across campus to arrive at class on time. as you walk to your seat, you notice that you are still breathing more heavily than usual. this is because you are experiencing the metabolism necessary to reestablish the resting metabolic rate of your cells.

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

Match the correct terms to their descriptions a system in which only energy but not matter is exchanged frozen water in snow part of geosphere that includes only soil a thin layer between the troposphere and the stratosphere cryosphere tropopause closed system pedosphere

Which of the following is most likely the result of an organism having lipids in its body a) water cannot be absorbed through the surface of a leaf b)human eats fruits to get a quick source of energy c) a sheep sleeps for more hours in the winter d) a warm river is filled with fish and algae