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Home > Biology > The biosphere > Control and management

Biology

The biosphere

Control and management - Test

1.

An example of an industrial pollutant is:

2.

Which of the following would reduce pollution by sulphur dioxide?

3.

What do micro-organisms use the sewage for?

4.

Compared to clean water, water with sewage has

5.

What effect does sewage have on water oxygen concentration?

6.

What effect does the extra energy the sewage provides have on the number of species able to live in a river?

7.

What term do we use to describe an organism which shows the level of pollution in an area?

8.

Pine Beauty moth caterpillars can strip the needles off whole forests of pine trees. To control the caterpillar population foresters use…

9.

Weeds compete with crop plants for nutrients, water and light. Farmers reduce this competition for resources by using…