The formula for exponential population growth is :-

1. dt/dN = rN

2. dN/rN = dt

3. rN/dN = dt

4. dN/dt = rN

Subtopic:  Population: Exponential Growth Model |
88%
From NCERT
NEET - 2006
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Find the correct mathematical expression for geometric growth resulting in a J-shaped population growth curve.

1. $\frac{\mathrm{dN}}{\mathrm{dt}}=\mathrm{rN}$

2. $\frac{\mathrm{K}-\mathrm{N}}{\mathrm{K}}$

3. $\frac{\mathrm{dN}}{\mathrm{dt}}=\mathrm{rN}\left(\frac{\mathrm{K}-\mathrm{N}}{\mathrm{K}}\right)$

4. $\frac{\mathrm{dN}}{\mathrm{dt}}=\mathrm{rN}\left(\frac{\mathrm{N}-\mathrm{K}}{\mathrm{N}}\right)$

Subtopic:  Population: Exponential Growth Model |
69%
From NCERT
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Exponential growth occurs when there is:

(1) Asexual reproduction only

(2) Sexual reproduction only

(3) No inhibition from crowding

(4) A fixed carrying capacity

Subtopic:  Population: Exponential Growth Model |
65%
From NCERT
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The innate potential to grow in number does not follow which of the following statements?

(1) Each species has this ability

(2) When resources are unlimited only then it is realized

(3) This is an ideal situation.

(4) Resource availability is not that essential for the unimpeded growth

Subtopic:  Population: Exponential Growth Model |
64%
From NCERT
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In a population growth rate curve the lag phase represents the period when a population is adjusting to a new environment.
II. In a population growth rate curve the steepest part of growth phase represents the period when a population is growing exponentially.
III. In the stationary phase of a population growth rate curve the population is in dynamic equilibrium
IV. Human have changed the carrying capacity of the earth.
(1) All are correct

(2) I, II, III

(3) II, III

(4) I, IV

Subtopic:  Population: Exponential Growth Model |
62%
From NCERT
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The equation of the exponential growth curve of the population has 'r’ that means which of the following statements?

1. Extrinsic rate of natural increase

2. An important parameter for assessing impacts of only biotic factors on population growth

3. For Norway rat, it values is 0.15

4. For flour beetle, it is 0.12

Subtopic:  Population: Exponential Growth Model |
From NCERT
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The graph shows two types of population growth curve. A is exponential and B is logistic.

Which one of the following growth model considered as more realistic one?

1. Exponential growth curve

2. Logistic growth curve

3. Both the growth curves

4. None of the above

Subtopic:  Population: Exponential Growth Model | Population: Logistic Growth Model |
88%
From NCERT
AIIMS - 2016
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Study the population growth curves shown in the above diagram.

Which option is the best for curve (i) and (ii)

 Type of (i) curve Type of (ii) curve Status of food & space for curve (i) Status & space for curve (i) 1. Logistic curve Exponential curve Unlimited Limited 2. Exponential curve Logistic curve Unlimited Limited 3. Logistic curve Exponential curve Limited Unlimited 4. Exponential curve Logistic curve Limited Unlimited

Subtopic:  Population: Exponential Growth Model | Population: Logistic Growth Model |
87%
From NCERT
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Which is correctly labelled with respect to the given diagram?

(1) B: Logistic curve

(2) C: Carrying capacity

(3) C: Exponential curve

(4) A: Carrying capacity

Subtopic:  Population: Exponential Growth Model | Population: Logistic Growth Model |
80%
From NCERT
AIIMS - 2012
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Under normal circumstances which of the following affects population density most?

1. Nt

2. B

3. I

4. E

Subtopic:  Population: Exponential Growth Model | Population: Logistic Growth Model |
67%
From NCERT
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