Which of the following is the best example of plants significantly affecting an animal's life cycle? a. a grove of orange trees is affected by a fungus. b. a decrease in bamboo causes the number of pandas to decline. c. a burr is caught in a dog's thick, shaggy fur. d. a maple tree provides sweet syrup for humans.

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.