Many chemicals are used to kill insects and protect plants. how could the removal of insects upset the balance of the ecosystem? a) the plants would rapidly decrease in number. b) animals that eat the insects would die as well. c) the animals in the ecosystem would eat all the plants. d) insects from other regions would replace the killed insects.

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The answer is B.)Animals that eat the insects would die as well.

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answer; the correct answer is (beta)

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.