Q. No.Of the total incident solar radiation the proportion of PAR is
1. about 60%
2. less than 50%
3. more than 80%
4. about 70%
Energy flow in an ecosystem is
(1) unidirectional
(2) bidirectional
(3) multi-directional
(4) All the these
What is the source of energy for all ecosystems on Earth, except for the deep sea hydro-thermal ecosystem?
1. Sun
2. Hydrothermal vents
3. Lava
4. Water
What proportion of the PAR (photosynthetically active radiation) is captured by plants?
1. 1 - 10%
2. 2 - 10%
3. 5 - 15%
4. 5 - 25%
Which of the following statement is incorrect?
| 1. | Ecosystems are exempted from the Second Law of thermodynamics. |
| 2. | An ecosystem has a tendency toward increasing disorderliness. |
| 3. | Flow of energy is unidirectional from the sun to producers and then to consumers. |
| 4. | All organisms are dependent for their food on producers, either directly or indirectly |
Which are the primary consumers in a grazing food chain?
1. Carnivores
2. Herbivores
3. Detrivores
4. Omnivores
What do secondary carnivores refer to?
1. Animals at second trophic level
2. Those animals that depend on the herbivores for food
3. Those animals that depend on the primary carnivores for food
4. Those animals that depend on the secondary herbivores for food
| Statement I: | In ecosystem, there is unidirectional flow of energy of sun from producers to consumers. |
| Statement II: | Ecosystems are exempted from 2nd law of thermodynamics. |
In the light of the above statements, choose the most appropriate answer from the options given below:
| 1. | Statement I is correct but statement II is incorrect |
| 2. | Statement I is incorrect but statement II is correct |
| 3. | Both statement I and statement II are correct |
| 4. | Both statement I and statement II are incorrect |
Which trophic level is incorrectly defined?
1. Carnivores- secondary or tertiary consumer
2. Decomposer- microbial heterotrophs
3. Herbivores - primary consumer
4. Omnivores - Molds, yeast and mushrooms
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