There are three levels of organisation in an ecosystem - Edexcel - GCSE Biology Combined Science - 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?
A community, population, organism
B c... 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 showing the levels of organisation from lowest to highest is:
C organism, community, population.
This order represents the hierarchy in ecological systems where organisms make up communities, and communities aggregate to form populations.
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 how the population of slugs changes over time in garden A.
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Answer
The population of slugs:
falls a little (1)
then increases (1)
starts to level off between 2.5 and 3 years / levels off after (approximately) 4 years.
