Stew Dious studies for his exam for such a long time that he falls asleep standing up. Stew pushes straight down on the floor with 150 pounds of force due to gravity and he does not move, as he is sound asleep. Check all of the following
statements that are true.
A The floor pushes straight up and to the right on Stew's feet.
B The floor pushes straight up on Stew's feet.
The floor force pushes in the same direction as Stew's feet.
D The floor pushes down on Stew's feet.
E The total force exerted by the floor on Stew's feet is 150 pounds.

Which is an advantage of having memory cells when a pathogen is encountered for a second time. a) the memory cells are what proliferate into clones of cells in response to the binding of an antigen. b) memory cells are vital to the primary immune response in that they immediately recognize pathogens even at the first encounter. c) memory cells are essentially effector cells that are short lived and attack antigens even without having a receptor specific to that antigen. d) it ensures that more lymphocytes with a receptor specific to a particular antigen will be present than in a host that had never encountered that pathogen.

The diagram shows the layers of earth. convection currents in which region influence the movement of tectonic plates

Which part of the cell is affected by the movement of molecules through diffusion, osmosis and active transport?