Q. No.Energy flow and nutrient cycling are two important components of an ecosystem. What will be true comparison of the two?
1.
The amount of energy is much greater than the amount of nutrients
2.
Organisms always need nutrients, but they don't always need energy
3.
Nutrients are recycled, but energy is not
4.
Organisms always need energy, but they don't always need nutrients
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
The ecological pyramids that can never be inverted in a natural ecosystem include:
| I: | pyramid of numbers |
| II: | pyramid of energy in any ecosystem |
| III: | pyramid of biomass in the sea |
1. Only II
2. Only III
3. Only II and III
4. All can be inverted
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Primary succession takes a very long time when compared to secondary succession, primarily, because:
1. immigration of pioneer species takes time
2. soil formation is a very slow process
3. there is a low availability of ecological niches
4. environmental conditions are highly variable
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Consider the given two statements:
| I: | In most ecosystems, all the ecological pyramids are largely upright. |
| II: | Pyramid of energy can be a notable exception to the above rule. |
1. Both I and II are correct.
2. Both I and II are incorrect.
3. Only II is correct.
4. Only I is correct.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
On the land, almost all primary production is performed by:
| 1. | Phytoplanktons | 2. | Algae |
| 3. | Mosses and Liverworts | 4. | Vascular plants |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Consider the given two statements:
| I: | Human burning of fossil fuels today is creating large contemporary imbalances in the carbon cycle. |
| II: | It has significantly increased the rate of release of carbon dioxide into the atmosphere. |
| 1. | Both I and II are correct and II explains I. |
| 2. | Both I and II are correct but II does not explain I. |
| 3. | I is correct but II is incorrect. |
| 4. | I is incorrect but II is correct. |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
If we put a price tag on nature’s life-support services, about 50 % of the total cost will be accounted for by:
1. Recreation and nutrient cycling
2. Soil formation
3. Climate regulation
4. Habitat for wildlife
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Suppose in an area, the energy present in total incident sunlight falling on primary producers is 10,00,000 J and about 10,000 J is converted by them into biomass. What percent of PAR have the primary producers been able to convert?
| 1. | 1 % | 2. | 2 % |
| 3. | 10 % | 4. | 20 % |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
In primary ecological succession in water, the pioneers are:
1. Mosses
2. Lichens
3. Phytoplankton
4. Free floating hydrophytes
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
In an open ocean, the pyramid of biomass is often inverted. How can this support higher trophic levels?
| 1. | The food produced by primary producers is of high quality |
| 2. | The primary producers grow and reproduce at high rates |
| 3. | Primary producers are very abundant. |
| 4. | The predators at higher trophic levels are very efficient |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
© 2024 GoodEd Technologies Pvt. Ltd.