Q. No.In a pond, there were 20 lotus plants last year. If through reproduction 4 new lotus plants are added, the number of offspring per lotus per year would be:
1.
0.2
2.
0.4
3.
2.0
4.
4.0
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The given age pyramid represents a:
| 1. | Fast expanding population | 2. | Slowly expanding population |
| 3. | Stable population | 4. | Declining population |
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The tiger census in our national parks and tiger reserves is often based on:
| 1. | Pug marks | 2. | Cub count |
| 3. | Area allocation | 4. | Collar position |
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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 |
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All the following are correct about the exponential growth of population except:
| 1. | It is represented by the equation dt/dN = rN |
| 2. | Resources in the habitat are unlimited |
| 3. | The rate of natural increase is represented by “r” |
| 4. | In 1981, the ‘r’ value for human population in India was 0.0205 |
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When population density is plotted against time, the exponential growth curve is:
| 1. | S shaped | 2. | Straight line |
| 3. | J shaped | 4. | Hyperbola |
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Which of the following is/are true for the given equation?
Nt = N0 ert
| I. | It is the integral form of exponential growth equation |
| II. | The rate of natural increase is represented by “r” |
| III. | “e” is the base of natural logarithm [2.71828] |
| 1. | I and II only | 2. | I and III only |
| 3. | II and III only | 4. | I, II and III |
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The Verhulst – Pearl equation represents what type of population growth?
| 1. | Exponential | 2. | Logistic |
| 3. | Decline | 4. | Stable |
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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 |
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Darwinian fitness is represented by:
| 1. | Low r value | 2. | High r value |
| 3. | High K value | 4. | Low K value |
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