According to the pie chart, most of the water on earth is in what form? a) oceans b) river systems c) frozen as ice d) underground water

If you are in a chronic state of anxiety but also suffer from moment of sudden, intense fear you are problably suffering. from

In what layer of the sun is energy transfers between atoms

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.