B cells produce antigen
t cell are helper,killer,memory cells
they hold memory of pathogens i the system
Answer:
Ig it's the point B which shows decrease in the population of predators or individuals.
Classification is subject to change because science is an evolving subject. New things are discovered every year and thus changing the way we understand the world around us.
Answer:
part A is the answer
Explanation:
The tympanic cavity is an air chamber; it contains a chain of movable bones which transmit the vibrations of the tympanic membrane across the cavity to the middle ear.
