Stomatas are pores on the plant leaf that control the flow of gases between the environment and the plant cells. this process the cells maintain a stable internal environment. which biology theme does this example represent?
a) interdepenndence in nature
b)regulation
c) energy transfer

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explanation:

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.