A major drawback of using fossil fuels as a source of energy is that they: A. Release water as well as some energy.

B. Produce only a small amount of energy.

C. Release a greenhouse gas when burned.

D. Undergo a chemical reaction when burned.

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.

Patient has just received an organ transplant which treatment would be most effective in preventing the patient’s body from

28. how many linkage groups will be formed by homogametic organism with 28 chromosomes?