If a new habitat is just being colonized, which of the following is most likely to contribute to an increase in the population density?
1. | Birth rate | 2. | Death rate |
3. | Immigration | 4. | Emigration |
When population density is plotted against time, the exponential growth curve is:
1. | S shaped | 2. | Straight line |
3. | J shaped | 4. | Hyperbola |
In the logistic growth equation given below, the carrying capacity is represented by:
\(\frac{\mathrm{dN}}{\mathrm{dt}}=\mathrm{rN}\left(\frac{\mathrm{K}-\mathrm{N}}{\mathrm{K}}\right)\)
1. | N | 2. | r |
3. | K | 4. | K – N / K |
Darwinian fitness is represented by:
1. | Low r value | 2. | High r value |
3. | High K value | 4. | Low K value |
Which of the following organisms does not breed only once in their life time?
1. | Pacific salmon | 2. | Marsupial mice |
3. | Birds | 4. | Bamboo |
As a part of their reproductive strategy, pelagic fishes:
1. | Produce a large number of small-sized offspring |
2. | Produce a small number of small-sized offspring |
3. | Produce a large number of large-sized offspring |
4. | Produce a small number of large-sized offspring |
A population interaction that is detrimental to both species would be:
1. | Mutualism | 2. | Competition |
3. | Predation | 4. | Amensalism |
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 |