Diffusion can be defined as question 5 options: movement through a cell membrane using energy from atp active transport of particles up a concentration gradient movement of particles from a region of low concentration to a region of high concentration movement of particles from a region of high concentration to a region of low concentration

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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.

What is the process by which biological parents pass traits such as hair type or eye color to their children