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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

One reason why human populations have been able to sidestep the factors that usually control population growth is that:

a. the carrying capacity for humans has remained constant sincehumans first evolved.

b. agriculture and industrialization have increased the carryingcapacity for our species.

c. the population growth rate (r) for the human population hasalways been small.

d. the age structure of human populations has no impact on itspopulation growth.

e. plagues have killed off large numbers of humans at certaintimes in the past.

Summary Introduction

Introduction:

Population can be defined as a group of individuals of the same species inhabiting the same geographical area. The population growth is described as the increase in the overall number of individuals. There are many factors which contribute to the population growth.

Explanation

Justification/explanation for the correct answer:

Option (b) states that agriculture and industrialization are the reasons why the human population has become capable of sidestepping all the factors that control population growth. These factors have given a boost to the carrying capacity for the human species. Agricultural yield has increased due to the massive use of pesticides, insecticides, and other chemicals. The industrialization in the field of medicines and health care also contributes to population growth. The increasing population is not affecting the carrying capacity as such due to agriculture and industrialization. Hence, option (b) is correct.

Explanation for the incorrect answer:

Option (a) states that since the evolution of the human species, the carrying capacity of humans has remained as such. There has been a continuous alteration in the carrying capacity and it has never remained constant. This cannot be the reason that humans have avoided the factors that control population growth. So, it is incorrect.

Option (c) states that the population growth rate of the human population has always remained small...

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