Q. No.Organisms that are capable of conversion of inorganic material into organic material with the help of the radiant energy of the sun include:
I:
Plants
II:
Photosynthetic bacteria
III:
Chemosynthetic bacteria
1. I only 2. I and II only 3. I and III only 4. I, II, and III
Primary carnivores are, most aptly, characterized as:
| 1. | Secondary producers | 2. | Primary consumers |
| 3. | Secondary consumers | 4. | Tertiary consumers |
The detritus food chain:
| I: | begins with dead organic matter |
| II: | is the major conduit of energy flow in aquatic ecosystem. |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
In a terrestrial ecosystem, a much larger fraction of energy flows through the:
| 1. | DFC | 2. | GFC |
| 3. | Either of DFC or GFC | 4. | Nither of DFC nor GFC |
In an aquatic food chain, zooplankton occupy which trophic level?
| 1. | First | 2. | Second |
| 3. | Third | 4. | Fourth |
Organisms at each trophic level depend on those at the lower level trophic level for their energy demands except:
| 1. | Primary consumers | 2. | Secondary consumers |
| 3. | Tertiary consumers | 4. | Decomposers |
Each trophic level has a certain mass of living material at a particular time, best called as:
| 1. | Biomass | 2. | Standing state |
| 3. | Standing crop | 4. | Gross productivity |
Approximately, what percent of energy is transferred to each trophic level from the lower trophic level in an ecosystem?
| 1. | 1 | 2. | 10 |
| 3. | 50 | 4. | 90 |
Identify the correct statements:
| I: | Only a few individuals can be taken into account at any trophic level and the deductions may be generalised. |
| II: | Trophic level is a functional level and does not represent a species. |
| III: | A given species may occupy more than one trophic level in the same ecosystem at the same time. |
| 1. | Only I and II | 2. | Only I and III |
| 3. | Only II and III | 4. | I, II, III and IV |
The pyramid of biomass in the sea is generally inverted because:
| 1. | the biomass of fish far exceeds that of phytoplankton at any given time |
| 2. | the major primary production to the sea is actually contributed by the terrestrial ecosystems |
| 3. | the flow of energy level does not follow the laws of thermodynamics in the sea |
| 4. | It is not true. The pyramid of biomass can never be inverted in any ecosystem |
© 2024 GoodEd Technologies Pvt. Ltd.