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There are three levels of organisation in an ecosystem - Edexcel - GCSE Biology Combined Science - Question 2 - 2021 - Paper 1

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There are three levels of organisation in an ecosystem. Which order shows the levels of organisation from lowest to highest? A community, population, organism B ... show full transcript

Worked Solution & Example Answer:There are three levels of organisation in an ecosystem - Edexcel - GCSE Biology Combined Science - Question 2 - 2021 - Paper 1

Step 1

Which order shows the levels of organisation from lowest to highest?

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Answer

The correct order is A: community, population, organism. This reflects the hierarchical structure within ecosystems, where a community is made up of various populations, and those populations consist of individual organisms.

Step 2

A scientist predicts that the number of caterpillars will decrease in garden A.

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Answer

There will be more food (lettuce) for the caterpillars to eat (because there are fewer slugs eating the lettuce).

Step 3

Describe the population changes of slugs over time.

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Answer

The population of slugs is expected to:

  1. Falls a little after the introduction of slug pellets.
  2. Then increases, as the remaining slugs can reproduce in a less competitive environment.
  3. Starts to level off between 2.5 and 3 years, stabilizing after approximately 4 years.

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