Name the part of the brain that perform the function of maintaining the posture and balance of the body

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.

Female luna moths (actias luna) attract males by emitting chemical signals that spread through the air. a male hundreds of meters away can detect these molecules and fly toward their source. the sensory organs responsible for this behavior are the comblike antennae visible in the photograph shown here. each filament of an antenna is equipped with thousands of receptor cells that detect the sex attractant. based on what you learned in this chapter, propose a hypothesis to account for the ability of the male moth to detect a specific molecule in the presence of many other molecules in the air. what predictions does your hypothesis make? design an experiment to test one of these predictions.

Match the following terms and definitions. the transformation of a larva to an adult; occurs only in animals having great differences in form between the larva and adult pupa 2. type of mammal that lays eggs monotreme nymph the part of certain insect life cycles in which the young animal has no wings or reproductive organs the developmental stage between larva and adult in insects undergoing metamorphosis metamorphosis 5. the male gonad which produces sperm testes