What function do most of the stem cells in adults serve? A. Differentiating into any type of cell
B. Repairing damaged DNA
C. Replacing damaged tissue
D. Growing new organs

i think the miocene epoch spans the time from 23 million to 12 million years ago.

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.