B2B

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  • Created by: ellxe
  • Created on: 19-05-16 09:06
What does each bar on a pyramid of biomass represent?
The mass of living material at that stage of the food chain
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Why are biomass pyramids always pyramid shaped?
Biomass is lost at each stage in the food chain
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Why is measuring dry biomass unethical?
You have to kill the organsism
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What does each bar on a pyramid of numbers show?
The number of organisms at that stage of the food chain
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Energy from where is the source of energy for nearly all life on earth?
The sun
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Where does energy lost at each stage go?
Used for staying alive e.g. respiration, heat loss, waste products
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What is egestion?
Food that cant be digested passes out as faeces
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What is excretion?
Waste products of bodily processes are released e.g. urine
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Why is there never a food chain with more than about 5 trophic levels?
So much energy is lost that theres not enough left to support the ones further up
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Efficiency calculation?
Efficiency = energy available to the next level/energy that was available to the previous level
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Other cards in this set

Card 2

Front

Why are biomass pyramids always pyramid shaped?

Back

Biomass is lost at each stage in the food chain

Card 3

Front

Why is measuring dry biomass unethical?

Back

Preview of the front of card 3

Card 4

Front

What does each bar on a pyramid of numbers show?

Back

Preview of the front of card 4

Card 5

Front

Energy from where is the source of energy for nearly all life on earth?

Back

Preview of the front of card 5
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