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Tutor HuntTest QuestionsBiology QuestionsYear 10 Biology Questions

 

Trophic Levels (biology Only) (GCSE Biology)

The following is a GCSE Biology test covering 'Trophic Levels (biology Only)' from the broader topic Ecology. The test is geared towards the AQA exam board style syllabus.
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Why might a pyramid of biomass be more accurate than a pyramid of numbers?
If a producer biomass is 2000 g m-2 and transfer efficiency is 10%, what is the expected biomass of the primary consumer level?
What is meant by the term ‘trophic level’?
Which factor would most directly increase primary productivity in an ecosystem?
Which diagram type shows the relative amount of biomass at each trophic level?
In an aquatic food chain phytoplankton ? zooplankton ? small fish ? seal, which is the tertiary consumer?
If herbivore biomass is 500 g m-2 and secondary consumers have biomass 50 g m-2, what is the transfer efficiency between these levels?
Which of the following best describes why longer food chains are less common?
Which process causes the most energy loss between trophic levels?
What does biomass most directly measure?
A fisherman catches many large tuna (top predators). Which effect is most likely if the tuna population is drastically reduced?