Brittany wants to investigate how long it will take henry to react to different sounds.

independent variable:

dependent variable:

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.

this is more of a statement than a question. is there answers to go along with this, or is it opinion based?

if you add everything up correctly you should get 69 i got this because 50 plus 19 is it