A biomass pyramid shows the total mass of the organisms that each trophic level occupies in an ecosystem. Usually, producers have a higher biomass than any other trophic level, but there can be lower amounts of biomass at the bottom of the pyramid if the rate of primary production per unit biomass is very fast.
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They are ineffective against viral infections because viruses can not be treated with antibiotics.
Covalent bonds allow carbon atoms to form numerous compounds.
