Lila is a high school student who has not been feeling very well recently. Her symptoms include
fatigue, bone pain and joint stiffness. Which of
the following deficiencies is the most likely
cause?
А. oxygen deficiency
B. carbon deficiency
C. nitrogen deficiency
D. phosphorus deficiency

Astructure that is found in a plant cell and not in an animal cell is a ? central vacuole mitochondrion nucleus ribosome

Select the best answer for the question, ly 12. which of the following behaviors is not an inherited behavior?

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.