Select the correct answer. Lily feels tired and weak in the evenings after work. Before starting her chores, she eats dinner. Which characteristic of life does Lily exhibit?
A.
growth
B.
need for energy
C.
organization
D.
regulation

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.