Identify the incorrectly matched pair:
Population interaction |
Species A |
Species B |
|
1. |
Mutualism |
+ |
+ |
2. |
Predation |
+ |
- |
3. |
Parasitism |
- |
- |
4. |
Commensalism |
+ |
0 |
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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 |
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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 |
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The most common means of morphological defense in plants against herbivory are:
1. | Spines | 2. | Thick cuticle |
3. | Thorns | 4. | Slime |
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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
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