The phase during mitosis in which chromosomes move into the center of the cell is . metaphase prophase interphase anaphase

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.

2. sketch the inside of the bean nodule, and describe or label what you observed with the hand lens.

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?