The logistic growth curve of animal population growth is more realistic than J shaped curve because:

1. Asexual mode of reproduction is rare in higher animals

2. Resources are finite and become limiting sooner or later.

3. Most animals are conformers rather than regulators

4. Abiotic factors affect animals more than plants

Subtopic: Â Population: Logistic Growth Model |

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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: Â Population: Exponential Growth Model |Â Population: Logistic Growth Model |

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From NCERT

AIIMS - 2016

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In nature, a given habitat has enough resources to support a maximum possible number, beyond which no further growth is possible. The limit is known as

1. Environmental resistance

2. Intrinsic rate of natural increase

3. Carrying capacity

4. Exponentially growth

Subtopic: Â Population: Logistic Growth Model |

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From NCERT

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Verhulst-Pearl population growth is described by the equation

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

2. N_{t} = N_{0}e^{rt}

3. N_{t} = N_{0}+B+l-D-E

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

Subtopic: Â Population: Logistic Growth Model |

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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: Â Population: Exponential Growth Model |Â Population: Logistic Growth Model |

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From NCERT

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What does K mean?

1. Nature's Carrying Capacity

2. Number of individuals of a species supported by nature as per the resources available

3. A maximum possible number of individuals of a species under practical circumstances.

4. All of these

Subtopic: Â Population: Logistic Growth Model |

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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: Â Population: Exponential Growth Model |Â Population: Logistic Growth Model |

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From NCERT

AIIMS - 2012

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Carrying capacity for a population is estimated at 500; the population size is currently 400; and rmax = 0.01. What is dN/dt?

(1) 0.01

(2) 0.8

(3) 8

(4) 50

Subtopic: Â Population: Logistic Growth Model |

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When the population density reaches the carrying capacity, the logistic growth curve is said to be in:

1. Lag phase

2. A phase of acceleration

3. A phase of deceleration

4. Asymptote

Subtopic: Â Population: Logistic Growth Model |

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From NCERT

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Under normal circumstances which of the following affects population density most?

1. Nt

2. B

3. I

4. E

Subtopic: Â Population: Exponential Growth Model |Â Population: Logistic Growth Model |

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