a. Why would you expect mice (herbivores) to be more common than weasels, foxes, or hawks (carnivores) in the environment?

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b. Why you would expect food chains to be short-4 or 5 links at most?

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c. The population size of a top predator is not held in check by another predator population. Why does a top predator population not increase constantly in size?

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d. What would you expect to happen to an ecosystem if one of the secondary consumer populations suffered a collapse?

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