7. A typical plant cell contains green structures in the cytoplasm. Animal cells do not have these green structures. These green structures capture energy from sunlight and change it to a form of energy cells can use to make food. * cytoplasm chloroplast cell wall O cell membrane​

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.