Students are using beads of different colors to represent the molecules in food. The beads can be connected in chains in
different arrangements to represent different kinds of
molecules.
What is the best way for the students to use the beads to
represent the processes of photosynthesis and cellular
respiration that allow plants and animals to get the energy they
need?

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.