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There are three levels of organisation in an ecosystem - Edexcel - GCSE Biology - Question 2 - 2021 - Paper 1
Question 2
There are three levels of organisation in an ecosystem. Which order shows the levels of organisation from lowest to highest? (b) Figure 3 shows food webs for two g... show full transcript
Worked Solution & Example Answer:There are three levels of organisation in an ecosystem - Edexcel - GCSE Biology - Question 2 - 2021 - Paper 1
Step 1
(b)(i) Give one reason why the number of caterpillars will decrease in garden A.
Answer
The number of caterpillars will decrease in garden A because the slug pellets kill slugs, which are the main food source for the caterpillars. With fewer slugs present, there will be less food available for the caterpillars to consume.
Step 2
(b)(ii) Give one reason why the number of caterpillars will increase in garden B.
Answer
In garden B, the population of slugs is likely to initially fall due to the effects of the slug pellets. After some time, as the slug population stabilizes, it will increase, leading to more food being available for the caterpillars. This increase in food supply will support a larger caterpillar population.