Energy transfer (Edexcel GCSE Biology Combined Science): Quizzes
📚Quizzes
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10 questions from this quiz
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Practise the questions
10 questions from this quiz
What percentage of energy at one trophic level is typically passed to the next?
What percentage of energy at one trophic level is typically passed to the next?
10%
During respiration, how is energy lost from food chains?
During respiration, how is energy lost from food chains?
As heat to the environment
Why are there fewer organisms at higher trophic levels?
Why are there fewer organisms at higher trophic levels?
Less energy available at each level
How many trophic levels does a typical food chain have?
How many trophic levels does a typical food chain have?
Four to five levels
What formula calculates efficiency of biomass transfer?
What formula calculates efficiency of biomass transfer?
Why can't carnivores transfer all biomass to the next level?
Why can't carnivores transfer all biomass to the next level?
They can't consume bones, hooves, and claws
Which organisms have the most energy available in an ecosystem?
Which organisms have the most energy available in an ecosystem?
Producers (plants)
Which waste product is formed from excess proteins and excreted in urine?
Which waste product is formed from excess proteins and excreted in urine?
Urea
Why are food chains rarely more than 5 trophic levels long?
Why are food chains rarely more than 5 trophic levels long?
Lots of energy lost at each stage
If 1000 kJ is available at one level and 100 kJ transferred, what is the efficiency?
If 1000 kJ is available at one level and 100 kJ transferred, what is the efficiency?
10%