The appearance of domesticated plants is taken to be the end of one great cultural period and the beginning of another. the period that ends with the beginning of domestication is called the

a. neolithic
b. natufian
c. paleolithic
d. premodern

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.