- 1(current)
Q. No.If ‘N’ is the population density at time ‘t’, then its density at time ‘t+1’ is:
| I. | Nt+1 = Nt + [(B+I) – (D+E)] |
| II. | B is a measure of Natality and D is a measure of Mortality |
| III. | If (B+I) is less than (D+E), the population density will increase |
| 1. | Only I and II are correct | 2. | Only I and III are correct |
| 3. | Only II and III are correct | 4. | I, II and III are correct |
Subtopic: Population: Exponential Growth Model |
88%
From NCERT
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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 |
Subtopic: Population: Exponential Growth Model | Population: Logistic Growth Model |
63%
From NCERT
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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 |
Subtopic: Population: Exponential Growth Model |
82%
From NCERT
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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 |
Subtopic: Population: Exponential Growth Model |
83%
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In the formula for exponential growth (dN/dt = rN), what does ‘r’ stand for?
| 1. | the carrying capacity of the environment |
| 2. | the change in time |
| 3. | the number of individuals in the population |
| 4. | the intrinsic rate of natural increase of the population |
Subtopic: Population: Exponential Growth Model |
92%
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Hints
Consider the given two statements:
| Assertion (A): | When resources in the habitat are unlimited, the population grows in an exponential or geometric fashion. |
| Reason (R): | When resources in the habitat are unlimited, each species has the ability to realise fully its innate potential to grow in number. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | (A) is True but (R) is False |
| 3. | (A) is False but (R) is True |
| 4. | Both (A) and (R) are True but (R) does not correctly explain (A). |
Subtopic: Population: Exponential Growth Model |
88%
From NCERT
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The correct equation for exponential population growth will be:
1. dN/dt = r + N
2. dN/dt = r/N
3. dN/dt = r N
4. dN/dt = r – N
1. dN/dt = r + N
2. dN/dt = r/N
3. dN/dt = r N
4. dN/dt = r – N
Subtopic: Population: Exponential Growth Model |
90%
From NCERT
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- 1(current)
Q. No.
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