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Edexcel GCSE Biology Topic 9 Ecosystems and material cycles overview quiz quiz

12questions. Pick an answer and you'll see why right away.

  1. What is a population in an ecosystem?

  2. Which is an abiotic factor?

  3. In mutualism, how are the two organisms affected?

  4. Which tool is best for studying how plant distribution changes from a path into a meadow?

  5. A mean of 8 daisies is found in 1 m squared quadrats placed at random in a 500 m squared field. Estimate the total number of daisies.

  6. Roughly what percentage of energy is passed on to the next trophic level?

  7. Which is a reason energy is lost between trophic levels?

  8. Producers contain 50000 kJ and the primary consumers contain 4000 kJ. What percentage of energy is transferred?

  9. Which human activity reduces biodiversity?

  10. Which two processes return carbon dioxide to the atmosphere in the carbon cycle?

  11. Why can plants not use nitrogen gas from the air directly?

  12. Why does keeping food in a fridge make it last longer?