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Item EN046007: Chimpanzees, humans, chickens, and oak trees all share an ancient common ancestor.

Some organisms, such as a chimpanzee and a human, have many similarities.  Others, such as a chicken and an oak tree, have fewer similarities.  What is TRUE about the ancestors of these organisms?

  1. Chimpanzees and humans share a common ancestor with each other, but chickens and oak trees do not share a common ancestor with each other.
  2. Chimpanzees and humans share a common ancestor with each other, and chickens and oak trees share a common ancestor with each other, but chimpanzees and humans do not share a common ancestor with chickens and oak trees.
  3. Because chimpanzees, humans, chickens, and oak trees are separate species, none of them shares a common ancestor with any other.
  4. Chimpanzees, humans, chickens, and oak trees all share an ancient common ancestor. 
Distribution of responses
Answer Choice
Overall
Grades
Gender
Primary Language
 
n = 1508
6–8
n = 894
9–12
n = 614
Male
n = 729
Female
n = 739
English
n = 1347
Other
n = 117
A. 62% 63% 62% 59% 66% 63% 57%
B. 14% 14% 14% 15% 14% 14% 17%
C. 13% 15% 11% 14% 13% 13% 16%
D. 10% 8% 13% 12% 8% 10% 9%