How do tidal power plants generate electricity? A. A barrage stores water during high and low tide. When the water is released, it turns the plant's turbines.
B. A barrage holds back water during high tide. The force of the water against the barrage turns the plant's turbines.
C. A barrage allows water to flow during high and low tide, this turn's the plant's turbines.
D. A barrage stops water from flowing out at low tide, creating a force that turns the plant's turbines.

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.