The suprachiasmic nuclei release growth hormone, which repair body tissues. report changes in light levels during the day and night to the optic nerve. are located in the brain stem. control falling asleep and awakening.

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.

Why is it important to study each branch of earth science?

Drag each tile to the correct box. arrange the layers and faults from oldest to youngest.