Item EN046004: Chimpanzees, humans, zebras, and worms all share an ancient common ancestor.

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

  1. Chimpanzees and humans share a common ancestor with each other, but zebras and worms do not share a common ancestor with each other.
  2. Chimpanzees and humans share a common ancestor with each other, and zebras and worms share a common ancestor with each other, but chimpanzees and humans do not share a common ancestor with zebras and worms.
  3. Because chimpanzees, humans, zebras, and worms are separate species, none of them shares a common ancestor with any other.
  4. Chimpanzees, humans, zebras, and worms all share an ancient common ancestor. 

Distribution of Responses

Chart showing distrubtion of responses for Item EN046004

Percent of students responding correctly

Overall12%
Grades 6–812%
Grades 9–1211%
Male13%
Female10%
Primary Language is English12%
Primary Language is not English12%

View data table