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 increase 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.

This is a typical grassland food web. it is also a small picture of an important cycle on earth: the carbon cycle. describe how the carbon gets into this food web. a) bacteria and fungi, the decomposers, recycle carbon from dead organisms. b) carbon is found in the grass and is passed from one level to the next in this food web. eliminate c) all living things give off carbon dioxide as a by-product of respiration and it is released into the atmosphere. d) plants use carbon dioxide as a reactant in photosynthesis, to make usable chemical energy in the form of a sugar.