ecology

1. Who among the following has hypothesised the structure and function of ecosystem ?

Bentham and Hooker
Darwin
Tansley
Hutchinson

Detailed SolutionWho among the following has hypothesised the structure and function of ecosystem ?

2. As an ecosystem, wetlands arc useful for which of the following ?

For nutrient recovery and cycling
For releasing heavy metals through absorption by plants
In reducing siltiation of rivers by retaining sediments
All the above

Detailed SolutionAs an ecosystem, wetlands arc useful for which of the following ?

3. Which one of the following is not related with ecological balance?

Water management
Afforestation
Industrial Management
Wild life protection

Detailed SolutionWhich one of the following is not related with ecological balance?

4. 143.If rainforests and tropical forests are the lungs of the Earth, then surely wetlands function as its kidneys Which one of the following functions of wetlands best reflects the abore statement ?

The water cycle in wetlands involves surface runoff, subsoil percolation and evaporation.
Algae form the nutrient base upon which fish, crustaceans, molluses, birds, reptiles and mammals thrive.
Wetlands play a vital role in maintaining sedimentation balance and soil stabilieation.
Aquatic plants absorb heavy metals and excess nutrients,

Detailed Solution143.If rainforests and tropical forests are the lungs of the Earth, then surely wetlands function as its kidneys Which one of the following functions of wetlands best reflects the abore statement ?

5. Which of the following is a correct statement?

Energy flow in the biospheric ecosystem is unidirectional.
Energy flow in the biospheric ecosystem is cyclic.
Relative loss of energy in natural ecosystem decreases with increasing trophic levels.
Species at progressively higher tropic levels appear to be less efficient, in using available energy.

Detailed SolutionWhich of the following is a correct statement?

6. Which of the following is not correct about ecosystem?

It comprises both, abiotic and biotic components.
It has its own productivity.
It is a closed system.
It is a natural resource system.

Detailed SolutionWhich of the following is not correct about ecosystem?

7. Which of the following is not true about the eco-system?

It represents all living organisms and physical environment in any given space-time unit.
It is a functional unit.
It has own productivity.
It is a closed-system. .

Detailed SolutionWhich of the following is not true about the eco-system?

8. The concept of ecosystem is attributed to:

A.H. Strahler
A.G. Tansley
C.C. Park
F.R. Fosberg

Detailed SolutionThe concept of ecosystem is attributed to:

9. Which of the following has the lowest mean net primary productivity?

Temperate forests
Tropical forests
Temperate grasslands
Tropical savanna

Detailed SolutionWhich of the following has the lowest mean net primary productivity?

10. In a grassland eco-system termites occupy the trophic level of _____.

Producers
Primary consumers
Secondary consumers
Tertiary consumers

Detailed SolutionIn a grassland eco-system termites occupy the trophic level of _____.

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Test 1