Q. No.The amount of carbon dioxide in the atmosphere is:
1. increasing
2. decreasing
3. holding steady
4. fluctuating wildly
1. increasing
2. decreasing
3. holding steady
4. fluctuating wildly
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 ecosystem that can survive in the absence of the Sun would be:
| 1. | tropical rainforest | 2. | tundra |
| 3. | benthic ocean | 4. | desert |
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.
An important feature of the phosphorus cycle is that its reservoir is in:
1. aquifers
2. soil and rocks
3. the atmosphere
4. the sun
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.
Most organic carbon on Earth is found in:
1. Atmosphere
2. Oceans
3. Biomass
4. Sedimentary rocks
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 generation of biomass of heterotrophic (consumer) organisms in a system is termed:
| 1. | biogeochemical cycles | 2. | net primary productivity |
| 3. | gross primary productivity | 4. | secondary productivity |
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.
Converting nitrate to nitrogen gas by anaerobes like Pseudomonas is:
| 1. | nitrogen fixation | 2. | ammonification |
| 3. | denitrification | 4. | eutrophication |
The highest net primary productivity per square meter is of:
| 1. | open ocean | 2. | boreal forest |
| 3. | tropical rainforest | 4. | temperate forest |
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.
A secondary consumer amongst the following is:
| 1. | a carnivore | 2. | a herbivore |
| 3. | a plant | 4. | apex predator |
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 productivity in an aquatic ecosystem is least likely to be limited by:
| 1. | nitrogen | 2. | carbon |
| 3. | phosphorus | 4. | iron |
© 2024 GoodEd Technologies Pvt. Ltd.