Biology; Chemistry; Physics: Post your doubts here!

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Okay, pyramid of Biomass refers to the energy levels and amount of energy available at each trophic level. Theses pyramids are always broader at the base and have narrow tops because energy is lost as it is passed from one level to another. Pyramids of number, as the name states tell us about the number of organisms at each trophic level. They can be wider at the base as well as narrow depending on the source. For example if there is a tree at the base of the pyramid of numbers then the base would be small because a single tree is consumed by many insects etc. But if there is grass at the base, a lot of grass is consumed by few goats, so base is wider.
 
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