The populations increase in their number due to:

Related Mcqs:

1. Carrying capacity is not a fixed factor of the land and will change as ______ with the seasons or over long periods so the process is dynamic as the populations are:

   A. Food B. Cover C. Water change D. All of the above...

2. Habitat destruction is the indirectly acting factor while _____ hunting are the main direct human factors affecting wildlife populations:

   A. Legal B. Illegal C. Both (a) & (b) D. None of these...

3. Sometimes sound and uninjured seeds may fail to germinate due to reduced activity of the seed or seed parts resulting in blockade of the growth. This may be due to:

   A. External effects of environment B. Internal conditions within the plant itself, i.e. Embryo dormancy or seed coat dormancy C. Both (a) & (b) D. None of these...

4. The unclassified area which constituted more than ____ of the total area at the time of independence, in due course of time, has dropped to the present level due to extension in the land use:

   A. 40% B. 50% C. 60% D. 70%...

5. The air pollution caused by phosphate fertilizer factories is due to:The air pollution caused by phosphate fertilizer factories is due to:

   A. Phosphene B. SiF4 C. Dust D. Halogens...

6. The level beyond which no major increase is possible represents:

   A. Stationary phase B. Biotic potential C. Acceleration limit D. Carrying capacity...

7. Immense increase in the number of organisms of a species is checked by:

   A. Environmental resistance B. Biotic potential C. Imigration D. All of these...

8. Due to modification of the environment by the plant community itself, when one community is replaced by another suitable community, the succession is called:

   A. Induced B. Deflated C. Allogenic D. Autogenic...

9. If a piece of land which had a plant community becomes barren due to some external thrust, the succession taking place here is called:

   A. Induced B. Deflated C. Secondary D. Retrogessive...

10. With the increase in water pollution, the BOD:

    A. Decreases B. Increases C. Remains the same D. Is no measure of pollution...