Static Quiz 18th February

1. The non-point pollution of river water involves discharge of pollutants through:

2. Man causes soil erosion through:

1. Use of improper ploughing methods.
2. Leaving roots of crop in the field after harvest.
3. Practicing trash farming.
4. Use of heavy machines.

Select the correct answer using the codes given below.

3. Which of the following evidences support the theory of gradual rise in air temperature and consequent global warming?

1. Spreading of tropical diseases towards temperate regions.
2. Downward shifting of snow lines of tropical mountains.
3. Freezing of permafrost areas.

Select the correct answer using the codes given below.

4. A balanced ecosystem is one in which the:

1. Number of organisms at all levels is equal.
2. Amount of biomass at all trophic levels is equal.
3. Organisms are interdependent on each other.

Select the correct answer using the codes given below.

5. With to the IUCN classification, extinct species are those which have been:

1. Completely eliminated from wild areas.
2. Completely eliminated from managed areas.

Which of the statements given above is/are correct?