Producers Green plants - they make glucose during photosynthesis. Primary consumers Usually eat plant material - they are herbivores. For example rabbits, caterpillars, cows and sheep. Secondary ...

The questions in this quiz are suitable for GCSE biology students studying trophic levels, pyramids of biomass, and transfer of biomass. If you struggled with the quiz, don't panic - we've got you!

Modern oceans, for comparison, max out at trophic level five or six, represented by apex predators like orcas, sperm whales, ...

Trophic cascades are powerful indirect interactions that can control entire ecosystems. Trophic cascades occur when predators limit the density and/or behavior of their prey and thereby enhance ...

Energy flow diagrams often depict secondary production as the flow leaving one trophic level and entering (being ingested by) the next. Many ecologists, however, have demonstrated that secondary ...

Predators at the top of a marine food chain 130 million years ago ruled with more power than any modern species, McGill ...