Maintaining Biodiversity (OCR A-Level Biology A): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What was the human population in 1800 compared to 2026?
What was the human population in 1800 compared to 2026?
1 billion to over 8 billion
What risk do fragmented populations face due to isolation?
What risk do fragmented populations face due to isolation?
Inbreeding & reduced genetic diversity
How much of Madagascar's natural forest cover has been lost?
How much of Madagascar's natural forest cover has been lost?
Almost all of it
What has happened to the North Sea's natural seabed ecosystems?
What has happened to the North Sea's natural seabed ecosystems?
Virtually all have been lost
By how much did Atlantic cod stocks decline in the 1990s?
By how much did Atlantic cod stocks decline in the 1990s?
Over 95%
What is monoculture in agriculture?
What is monoculture in agriculture?
Growing single crop species extensively
Which agrochemicals control weeds that compete with crops?
Which agrochemicals control weeds that compete with crops?
Herbicides
By what percentage did UK specialist farmland birds decline from 1970 to 2013?
By what percentage did UK specialist farmland birds decline from 1970 to 2013?
Approximately 65%
How large is the Gulf of Mexico dead zone that develops each spring?
How large is the Gulf of Mexico dead zone that develops each spring?
22,000 square kilometres
What percentage of ocean biodiversity do coral reefs contain?
What percentage of ocean biodiversity do coral reefs contain?
Approximately 25%