Biodiversity Flashcards
All 5 cards in this deck
What is biodiversity?
The variety of all the different species of organisms on Earth, or within an ecosystem.
A great biodiversity ensures the stability of an ecosystem by reducing what?
The dependence of one species on another for food, shelter and the maintenance of the physical environment.
True or false? Biodiversity means the total number of organisms living in an ecosystem.
False. It is the variety of different species, not the number of individuals.
True or false? The future of the human species on Earth relies on us maintaining a good level of biodiversity.
True. Many human activities reduce biodiversity, and measures to stop this have only been taken recently.
What are the steps to work out how many times greater one population value is than another?
e.g. 6.0 billion in 2000 compared with 1.6 billion in 1900
- Divide the later value by the earlier value:
- Answer: (no units given)