Question

American bison were once abundant throughout the continent, but were hunted almost to extinction in the late 1800s. Today, the is recovering, but the previous rapid decrease in size has reduced the of the animals. This kind of likely occurred because only a few individuals survived of the original larger population. A change in following a large reduction in population size is called a(n) ___

Answer 1

Answer: Bottleneck effect

Explanation:

  The bottleneck effect is terms of population size is one of the concept in which there is large reduction in the population size due to the various types of environment related factors and also due to the human activities are as follows:

• Floods
• Droughts
• Fires
• Earthquakes
• Planning of the human population

 According to the given question, Bottleneck effect is one of the congestion point in which the large number of species or we can say that population is killed and it also increase the genetic drift. So, the above given situation is illustrating the concept of bottleneck effect.    

 Therefore, Bottleneck effect is the correct answer.