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 |
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 |
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 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 |
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 |
Assertion (A): | The logistic growth model is more realistic for most animal populations in nature. |
Reason (R): | Resources for growth for most animal populations are finite and become limiting sooner or later in the nature. |
1. | (A) is True but (R) is False. |
2. | Both (A) and (R) are True and (R) correctly explains (A). |
3. | (A) is False but (R) is True. |
4. | Both (A) and (R) are True but (R) does not explain (A). |