Q. No.“Competitive Exclusion Principle” may be true if:
1. The competing species are equally capable
2. Resource partitioning occurs
3. There is only intraspecific competition
4. Resources are limiting
1. The competing species are equally capable
2. Resource partitioning occurs
3. There is only intraspecific competition
4. Resources are limiting
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One mechanism that promotes co-existence rather than exclusion amongst competing species is:
| 1. | Periodic migration | 2. | Hibernation and aestivation |
| 3. | Resource partitioning | 4. | Reproductive isolation |
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Cuckoos laying their eggs in the nests of crow is an example of:
| 1. | Ectoparasitism | 2. | Endopararsitism |
| 3. | Hyperparasitism | 4. | Brood parasitism |
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An orchid growing as an epiphyte on a mango branch is an example of:
| 1. | Ectoparasitism | 2. | Endopararsitism |
| 3. | Commensalism | 4. | Mutualism |
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All the following relations are examples of commensalism except:
1. Sea anemone and clown fish
2. Cattle egret and grazing cattle
3. Barnacles growing on the back of whale
4. Cuscuta growing on hedge plants
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In mycorrhiza, the fungi help the plant in:
1. Synthesis of high energy carbohydrates
2. Absorption of essential nutrients from the soil
3. Nitrogen fixation
4. Biocontrol of pathogens
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To get pollinated by a bee, the Mediterranean Orchid, Ophrys, employs:
1. Sexual deceit
2. Pseudo-copulation
3. Reward in the form of nectar
4. Place for laying eggs
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A population with a population pyramid that has an extremely broad base will most likely be:
| 1. | a rapidly expanding population |
| 2. | a stable population |
| 3. | a population where the birth rate equaled the death rate |
| 4. | a population where there were more old than young individuals |
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The biome characterized by a mean annual temperature between 5C and 22C and mean annual precipitation between 5 cm and 50 cm is:
1. Desert
2. Arctic and alpine tundra
3. Temperate forest
4. Grassland
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