Biomes are large regions characterized by certain conditions, including a range of climate and ecological communities adapted to those conditions. ecosystems consist of all interactions between biotic and abiotic factors functioning together in an area. how are ecosystems and biomes related?
a. biomes and ecosystems are identical in size and composition.
b. a biome includes many similar ecosystems.
c. organisms found in ecosystems cannot be found in biomes.
d. an ecosystem includes many different biomes.

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.