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Item EN014002: Many species have become extinct throughout the history of life on earth.

Which of the following is TRUE about the extinction of species?

  1. Very few species have ever become extinct.  Most continue to exist.
  2. There have been extinction events in which many species became extinct at about the same time.  Aside from these, extinction is very rare.
  3. Up until recently, species rarely became extinct.  Humans have cause the majority of extinctions.
  4. Many species have become extinct throughout the history of life on earth. 
Distribution of responses
Answer Choice
Overall
Grades
Gender
Primary Language
 
n = 3140
6–8
n = 1922
9–12
n = 1218
Male
n = 1517
Female
n = 1569
English
n = 2793
Other
n = 267
A. 9% 11% 7% 11% 8% 9% 12%
B. 15% 15% 15% 16% 15% 15% 16%
C. 24% 26% 21% 24% 23% 24% 23%
D. 52% 48% 58% 49% 55% 52% 49%