I'm not quite sure which is the right answer and i wanted to get a seconed opinion. does anyone know the answer? how is the global human population projected to change in the next 40 years? a) decrease exponentially b) increase exponentially c) stop increasing d) begin increasing

answer; the above statement is (true);

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.