Select all that apply. Three diseases discussed in this lesson that can cause diarrhea are:

tetanus
amoebic dysentery
typhus
bacillary dysentery
cholera
food poisoning

Why aren't the stains like crystal violet and safranin washed away with water during simple staining?

What are some characteristics of a free enterprise economy?

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.