Chapter 4, Problem 4A

Summary Introduction

Introduction :

Population growth graph is given with respect to time showing population growth. This graph shows S-shape growth of the population with respect to time.

Answer to Problem 4A

Correct answer :

The correct answer is option (c) Logistic growth.

Explanation of Solution

Explanation/justification for the correct answer :

Option c) logistic growth. This graph is S-shaped, hence it shows logistic growth. In logistic growth, population’s per capita growth rate gets smaller as the population size increases, and this is due to the limited resources available in the environment. This phenomenon denotes carrying capacity. So, the correct option is c)

Explanation for incorrect answer :

Option a) exponential growth. Exponential growth shows J-shape growth curve , and in this population’s per capita growth remains same regardless of the population size, which results in increase in the population at a faster rate.

Option b) lag phase. Lag phase is the initial phase in which no growth in the population occurs with respect to time.

Option d) straight line graph. Straight line graph represents static or no change in the population growth with respect to time.