In a plasma membrane, how do the tails of the phospholipid molecules line up?

they are sandwiched between two layers of heads.

they tangle randomly to form a fiber.

they alternate with the heads.

they stick out with the heads in the center.

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.

i don't know, but does anyone wanna be friends? i'm doing my homework at 1: 49 in the morning : /