What statement describes the relationship between the deer and the bear and the food web? a)autotrophs supply food for the heterotrophs b) jeterotrophs compete for the same food c) autotrophs and heterotrophs share the same food source d) heyerotrophs supply food to autotrophs

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.

because they are eaten by the frog and the frog getseaten by the snake and the snake by the eagle