Plants also have a circulatory system to transport nutrients to and from cells. [phloem and xylem] true false

What would happen to the nutrients in an ecosystem if decomposers, such as bacteria, didn’t exist there?

What came first egg or chicken? and is tomato a vegetable or a fruit?

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.