what is the most prominent source of energy for almost all life on earth?
the sun
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How do plants/alagae make food (glucose)?
They use the sun's energy to photosynthesis which produces glucose(food).
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How do plants use glucose?
They use it to respire & make biological molecules, like cellulose(part of cell wall)-these biological molecules make up a plants biomass
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How is energy transferred in a food chain of an ecosystem?
When one organism eats another.
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Why is biomass lost at each trophic level?
This is because the animal already uses some of its energy(Biomass) in order to respire,to move or energy is lost thru egestion & excretion. So there's less energy left when it gets eaten by another organism as it has lost some of the energy
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What is egestion?
This is when you get rid of the undigested food e.g. animal faeces
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what is excretion?
this is when you get rid of waste products from chemical reactions in the body e.g.thru urinating,sweating or breathing out
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why do you get biomass pyramids in that shape?
this is because at each trophic level, most of the biomass is lost, so there's fewer biomass left with more trophic levels
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Why don't you often get food chains with more than 5 trophic levels?
this is because so much of the biomass/energy is lost at each trophic level, there's not enough to support organisms after many stages
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What is the formula to calculate the efficiency (%) of biomass transfer?
Efficiency (%) = (biomass available to next level/biomass available to previous level) x 100
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What is the efficiency of biomass mass transfer also known as?
percentage biomass transferred
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Give the ways on how biomass is lost at each trophic level
respiration,through movement,egestion,excretion,not all of an organism is eaten,animal uses biomass to maintain a constant body temperature
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Other cards in this set
Card 2
Front
How is energy stored in living organisms?
Back
as biomass
Card 3
Front
what is the most prominent source of energy for almost all life on earth?
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