Meiosis is a type of cell division that goes through how many rounds of the 4 mitotic steps A)1 B)2 C)3 D)4?

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

(99 points) be serious! how do farts work? how do you fart without it stinking? serious answers only

The vaccine in a flu shot contains weakened flu viruses. how does a flu shot work with the immune system? a. it destroys lymphocytes. b. it destroys macrophages. c. it activates macrophages. d. it activates lymphocytes.