Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332



Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332
Textbook Problem

Passenger pigeons were driven to extinction ___ .

  1. a. by introduced pathogens
  2. b. by overharvesting
  3. c. as a result of global warming
  4. d. by competition with introduced birds.

Summary Introduction

Introduction: Declination of biodiversity on the world’s ecosystem can be characterized by the influence of human activities. In fact, by human activities, the environment is deeply altered; territory has been modified totally, and some species are exploited directly by hunting, by biochemical cycle changing, and by transferring the species from one area to another of the planet. There are many other causes like loss and alternation of habitats, introduction of genetically-modified organisms, exotic species, pollution, and climatic changes.


Reasons for the correct statement:

Species are overharvested not only as food, but also for use in traditional medicines, for the pet trade, and for ornamentation. Due to human activities like hunting and overharvesting, the wild passenger pigeon species are shot and taken as food. These birds are commercially hunted for years. In fact, human activities like hunting and overharvesting directly decreases the number of passenger pigeons.

Option b. is given as “by overharvesting”

Passenger pigeons were driven to extinction by overharvesting. Option b. is correct.

Reasons for the incorrect statement:

Option a. is given as “by introduced pathogens”...

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