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Logistic growth :...

Logistic growth :

A

is more realistic growth

B

showns J - Shaped curve

C

Shows linear curve

D

occurs when natural resources are unlimited

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The correct Answer is:
A
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Read the following text and answer the following question on the basis of the same : Growth of population with time shows specific and predictable patters. Two types of growth patter of populaiton are exponetial and logistic growth . When resource in the habitat are unlimited each species has the ability to relize fully its innate potential to grow in number . Then the population gorws in exponential fashion . When the resource are limited growth curve shows an inital slow rate and then it accelerates and finally slows giving the gorwth curve which is sigmoid . The equations correctly represents Verhulst-Pearl logistic growth is:

Assertion : A population growing in a habitat with limited resources shows initially a lag phase, followed by phase of accelerated and deceleration and finally as asymptote, when the population density reaches the carrying capacity. Reason : In Verhulst-Pearl Logistic growth, plot of N (population density) at time (t) results in a sigmoid curve.

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(a) Write an equation for Verhulst Pearl logistic . Growth where N = Population density at a time t r = Intrinsic rate of natural increase K = Carrying capacity (b) Draw a graph for a population whose population density has reached the carrying capacity . (c) Why is the logistic growth model considered a more reallistic one for most animal populations ? (d) Draw a growth curve where resources are not limiting to growth of a population.

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