Q. No.A population interaction where one species is harmed whereas the other is unaffected is called as:
1.
Mutualism
2.
Competition
3.
Predation
4.
Amensalism
Identify the incorrectly matched pair:
|
Population interaction |
Species A |
Species B |
|
|
1. |
Mutualism |
+ |
+ |
|
2. |
Predation |
+ |
- |
|
3. |
Parasitism |
- |
- |
|
4. |
Commensalism |
+ |
0 |
Predators do not:
| 1. | act as ‘conduits’ for energy transfer across trophic levels |
| 2. | keep prey populations under control |
| 3. | over-exploit their prey |
| 4. | help in maintaining species diversity in a community |
When certain exotic species are introduced into a geographical area, they become invasive mainly because:
| 1. | The invaded land has unlimited resources for the introduced species |
| 2. | The invaded land does not have its natural predator |
| 3. | The population of the introduced species in the invaded land is very low |
| 4. | Introduced species do not face any competition in the introduced land |
The most common means of morphological defense in plants against herbivory are:
| 1. | Spines | 2. | Thick cuticle |
| 3. | Thorns | 4. | Slime |
Nicotine, caffeine, quinine and opium produced by plants are actually:
| 1. | Primary metabolites needed in reproduction |
| 2. | Secondary metabolites needed for growth |
| 3. | Alkaloids that are present in seeds |
| 4. | Defenses against grazers and browsers |
Consider the given statements regarding competition amongst organisms:
| I: | Only related species can compete for the same resource |
| II: | Competition occurs only when the resources are limiting |
The correct statement/s is/are:
| 1. | I alone | 2. | II alone |
| 3. | Both I and II | 4. | Neither I nor II |
A process in which the fitness of one species is significantly lower in the presence of another species, is termed as :
| 1. | Predation | 2. | Parasitism |
| 3. | Competition | 4. | Amensalism |
Abingdon tortoise in Galapagos islands became extinct within a decade after goats were introduced on the island due to:
1. Habitat fragmentation
2. Better browsing efficiency of goats
3. Predator of goat attacking tortoise
4. Virus of goats parasitizing tortoise
“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 |
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