What is biodiveristy?

Biodiversity is the variety of all the different species of organisms on earth, or within an ecosystem.

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Give 3 reasons why maintaining high biodiversity is important.

Biodiversity is important for numerous reasons and is essential to our survival. A few specific reasons include:


  1. It increases the stability of ecosystems so that changes are less likely to have adverse effects.
  2. Many species provide specific services, such as pollinating crops, producing oxygen, cleaning air and water, and controlling pests.
  3. Many of our medicinal drugs come from wild organisms.

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What is the effect of pollution on biodiversity?

Pollution decreases biodiversity. 

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What types of pollution might enter the water due to mismanaged waste?

1Sewage.


2Fertiliser run off.


3Toxic chemicals (for example from industrial processes).

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What type of pollution could enter the air due to mismanaged waste?

1Nuclear waste.


2Chemicals from landfill.


3Toxic chemicals (for example from industrial processes).

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What is deforestation?

Deforestation is the cutting down of trees in a forest.

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What are the two main reasons for deforestation?

  1. To provide land for agriculture, such as cattle and rice fields.


  1. To grow crops for biofuels.


  1. For the mining and logging of wood.

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