What is one type of white blood cell that participates in the specific immune response called?
a.
antigens
b.
antibodies
c.
macrophages
d.
pathogens

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

hope this ! : )

i really dont know but i will try okay.

so i think u would just add all them up and get your answer..