When looking through a microscope, you observe a cell that has
cytoplasm and a cell wall. Which structure would you look for to
determine if the cell is a prokaryote or eukaryote?
A. Ribosomes
B. Nucleus
C. Cell membrane
D. DNA

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.

your answer should be c) enjoy!