The ‘Competitive Exclusion Principle’ was given by:
1. | Gause | 2. | Connell |
3. | Tillman | 4. | Paul Ehrlich |
A species whose distribution is restricted to a small geographical area because of the presence of a competitively superior species, is found to expand its distributional range dramatically when the competing species is experimentally removed. This is called:
1. | Competitive Exclusion | 2. | Competitive Release |
3. | Competitive Supremacy | 4. | Competitive Inclusion |
“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 |
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 |
Cuckoos laying their eggs in the nests of crow is an example of:
1. | Ectoparasitism | 2. | Endopararsitism |
3. | Hyperparasitism | 4. | Brood parasitism |
An orchid growing as an epiphyte on a mango branch is an example of:
1. | Ectoparasitism | 2. | Endopararsitism |
3. | Commensalism | 4. | Mutualism |
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 |
Lichens represent an intimate mutualistic relationship between a fungus and:
1. | an algae | 2. | a cyanobacterium |
3. | a brown alga | 4. | either 1 or 2 |
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
The fig tree is pollinated by a:
1. | Honeybee | 2. | Wasp |
3. | Bird | 4. | Moth |