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Pyramids Of Biomass (biology Only) (GCSE Biology)

The following is a GCSE Biology test covering 'Pyramids Of Biomass (biology Only)' from the broader topic Ecology. The test is geared towards the AQA exam board style syllabus.
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Below a typical questions that will be covered in this test. You final score will be logged on your account

When would a pyramid of biomass most likely be nearly upright (broad base tapering to a point)?
In a typical food chain, which trophic level forms the base of a pyramid of biomass?
Why are pyramids of biomass usually measured using dry mass rather than wet mass?
Which best explains why energy pyramids and biomass pyramids are related but not identical?
How can harvesting of primary producers (e.g., cutting grass for silage) change the pyramid of biomass on a farm?
What is the main limitation of using numbers (a pyramid of numbers) instead of biomass when assessing a trophic structure?
Which factor can cause a pyramid of biomass to vary between ecosystems?
If a farmer increases the efficiency of energy transfer to livestock with improved feed, what would you expect to happen to the livestock biomass?
For a pyramid of biomass based on a grassland, which sampling method would give the most reliable producers’ biomass estimate?
Which trophic level would you expect to have the smallest total biomass in most ecosystems?
Which method is least appropriate for constructing a pyramid of biomass for aquatic phytoplankton?