Biology: Food chains, energy, biomass and cycles

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Energy in biomass

Food chains show the feeding relationships between living things. 

Food chains show what eats what in a particular habitat. Pyramids of biomass reveal the mass of the living material at each stage. The amount of material and energy decreases at each stage. The arrows between each item in a food chain always point to the direction of energy flow. 

Radiation from the Sun is the ultimate source of energy for most communities of living things. Green plants and algae absorb some of the Sun's light energy and transfer this to chemical energy (photosynthesis). The other organisms in the food chain are consumers because they all get their energy and biomass by eating other organisms. 

Energy is transferred along food chains from one stage to the next but not all of the energy available to organisms at one…


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