6 A student drew the picture of a human body system shown below. The student labeled some
of the organs of the system.
Nose-
Mouth
Larynx
Lung-
Bronchus-
KIVITINY
Laryngopharynx
-Trachea
+ -Lung
-Bronchus
-Bronchioles
-Diaphragm

The main function of this human body system is to -

F sense odors in the environment
G exchange gases with the environment
H chew food as it enters the mouth
j trap partides that enter the nose

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.

Which entry is in the wrong position in the table?

Linda and julia are trying to determine whether their ideas are scientific or pseudoscientific. linda's idea is free of bias. julia's idea gives the same result when tested repeatedly. which statement is correct about linda and julia's idea?