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Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892

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BuyFindarrow_forward

Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892
Textbook Problem

According to the logistic model of population growth, the absolute number of individuals by which a population grows during a given time period:

a. gets steadily larger as the population size increases.

b. gets steadily smaller as the population size increases.

c. remains constant as the population size increases.

d. is highest when the population is at an intermediate size.

e. fluctuates on a regular cycle.

Summary Introduction

Introduction:

A population comprises all the living organisms present on the earth. This includes humans, animals, plants, and others. All the organisms require sufficient amount of food and water in order to survive.

Explanation

Explanation for the correct answer:

Option (d) states that Absolute number of individuals is highest when size of a population is intermediate. Growth of individual during the intermediate stage of population is very rapid. This is due to the presence of enough resources for a given population in order to survive. According to the logistic growth model, the initial population growth is less, which grows rapid at an intermediate stage. Hence, option (d) is correct.

Explanation for the incorrect answer:

Option (a) states that population, which grows due absolute number of individuals, gets larger steadily as the size of population increases. The population size when reaches the carrying capacity causes the decrement in the absolute number of individuals. This is due to the limited supply of resources and more number of individuals would result in scarcity of resources and hence, it would cause the decline in the number of individuals that is absolute. So, it is an incorrect option.

Option (b) states that the population, which grows due absolute number of individuals, gets smaller steadily as there is the increase in the size of population...

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