B2B 0.0 / 5 ? BiologyEnergy flowGCSEOCR Created by: ellxeCreated 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 1 of 10 Why are biomass pyramids always pyramid shaped? Biomass is lost at each stage in the food chain 2 of 10 Why is measuring dry biomass unethical? You have to kill the organsism 3 of 10 What does each bar on a pyramid of numbers show? The number of organisms at that stage of the food chain 4 of 10 Energy from where is the source of energy for nearly all life on earth? The sun 5 of 10 Where does energy lost at each stage go? Used for staying alive e.g. respiration, heat loss, waste products 6 of 10 What is egestion? Food that cant be digested passes out as faeces 7 of 10 What is excretion? Waste products of bodily processes are released e.g. urine 8 of 10 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 9 of 10 Efficiency calculation? Efficiency = energy available to the next level/energy that was available to the previous level 10 of 10
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