Answer:
Chemicals that are secreted from antigen-presenting cells then activate helper T cells.
Explanation:
Answer:
in the Air sacs
Explanation:
the air sacs has a million tiny holes and that is probably where oxygen transfers
<span>Fatty Acid- consists of a straight chain of an even # of carbon atoms, w/ hydrogen atoms along the length of the chain and at one end of the chain & a carboxyl group at the other end of it. I hoped this helped!</span>
They are capable of renewing and dividing (multiplying) themselves for long periods of time, they are unspecialized, and they can give rise to other specialized cell types. Hope this helps!! :)
Water and carbon are major components of all life.Prokaryotic and eukaryotic are the two major categories of cells making up life on earth.
