In a food chain, each trophic level gets about 50% of the energy from the previous trophic level.

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The civilian conservation corps (ccc), an agency established during the great depression as part of the new deal, created jobs for people who were unemployed. what kind of work did people do as part of the ccc? a. built libraries and hospitals b. maintained state and national forests c. photographed migrants and the homeless d. constructed roads and bridges

Rank the following from most to least devasting: ordovician, permaian, cretaceous, pleistocene

Federalism began to spread super soon after