EcologyAQA GCSE Biology (8461)

Biodiversity and the Effect of Human Interaction on Ecosystems

Work through the notes, try the practice questions, then take the quiz. The report tells you exactly what to revise next. (2026)

Practice progress

5 MCQs

0 of 5 attempted

Correct

Incorrect

Remaining

1
Biodiversity is best defined as:
Answer & explanation
Correct: option B
Biodiversity = variety of ALL species (plants, animals, fungi, bacteria), not just animals or just numbers.
2
Why does high biodiversity make ecosystems more stable?
Answer & explanation
Correct: option B
With many species, no single species is a single point of failure — many alternative pathways exist.
3
Which is NOT a major threat to biodiversity?
Answer & explanation
Correct: option C
Photosynthesis supports biodiversity. The other three are major drivers of loss.
4
A wheat monoculture is vulnerable to disease because:
Answer & explanation
Correct: option B
Low genetic diversity means a pathogen that infects one plant can infect all of them.
5
Which UK habitat stores the most carbon per hectare?
Answer & explanation
Correct: option B
UK peat bogs are massive long-term carbon stores — more carbon per hectare than UK forests.

EcologyAQA GCSE Biology (8461)

Work through the notes, try the practice questions, then take the quiz. The report tells you exactly what to revise next. (2026)

5 MCQs

0 of 5 attempted

Correct

Incorrect

Remaining

1
Biodiversity is best defined as:
Answer & explanation
Correct: option B
Biodiversity = variety of ALL species (plants, animals, fungi, bacteria), not just animals or just numbers.
2
Why does high biodiversity make ecosystems more stable?
Answer & explanation
Correct: option B
With many species, no single species is a single point of failure — many alternative pathways exist.
3
Which is NOT a major threat to biodiversity?
Answer & explanation
Correct: option C
Photosynthesis supports biodiversity. The other three are major drivers of loss.
4
A wheat monoculture is vulnerable to disease because:
Answer & explanation
Correct: option B
Low genetic diversity means a pathogen that infects one plant can infect all of them.
5
Which UK habitat stores the most carbon per hectare?
Answer & explanation
Correct: option B
UK peat bogs are massive long-term carbon stores — more carbon per hectare than UK forests.