Regarding phosphorus cycle:
I: | There is no respiratory release of phosphorus into atmosphere |
II: | Atmospheric inputs of phosphorus through rainfall of phosphorus is small |
1. Only I is true.
2. Only II is true.
3. Both I and II are true.
4. Both I and II are false.
The price tag put by researchers on the annual ecosystem services is about:
1. USD 11 trillion
2. USD 22 trillion
3. USD 33 trillion
4. USD 44 trillion
Identify the incorrectly matched pair:
Ecosystem service |
Cost out of total [%] |
|
1. |
Soil formation |
50 |
2. |
Nutrient cycling |
10 |
3. |
Climate regulation |
6 |
4. |
Habitat for wildlife |
3 |
Identify the incorrectly matched pair:
1. Carnivores -- secondary or tertiary consumer
2. Decomposers -- microbial heterotrophs
3. Herbivores -- primary consumer
4. Omnivores -- molds, yeasts and mushrooms
The process of mineralization by micro-organisms helps in the release of:
1. | Inorganic nutrients from humus |
2. | Both organic and inorganic nutrients from detritus |
3. | Organic nutrients from humus |
4. | Inorganic nutrients from detritus and formation of humus |
Productivity is the rate of production of biomass expressed in terms of :
i.
ii.
iii.
iv.
1. | ii | 2. | iii |
3. | ii and iv | 4. | i and iii |
Pyramid of numbers is :
1. Always upright
2. Always inverted
3. Either upright or inverted
4. Neither upright nor inverted
Among the following, where do you think the process of decomposition would be the fastest?
1. | Tropical rain forest | 2. | Antarctic |
3. | Dry arid region | 4. | Alpine region |
During the process of ecological succession, the changes that take place in communities are :
1. Orderly and sequential
2. Random
3. Very quick
4. Not influenced by the physical environment
Climax community is in a state of :
1. Non-equilibrium
2. Equilibrium
3. Disorder
4. Constant change