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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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Which process causes the most energy loss between trophic levels?
Why is energy lost between trophic levels?
Which human activity is most likely to reduce the number of trophic levels in an ecosystem?
Why are decomposers essential for nutrient cycling?
Which trophic level do primary consumers occupy?
Which diagram type shows the relative amount of biomass at each trophic level?
Which statement about omnivores is correct?
In a simple grass ? rabbit ? fox food chain, what is the rabbit classified as?
Why are there usually fewer organisms at higher trophic levels?
Which of the following organisms is normally a primary producer in a terrestrial food chain?
In an aquatic food chain phytoplankton ? zooplankton ? small fish ? seal, which is the tertiary consumer?