Item EN046003: Cats, dogs, fish, and birds all share an ancient common ancestor.

Some animals, such as a cat and a dog, have many similarities.  Others, such as a fish and a bird, have fewer similarities.  What is TRUE about the ancestors of these animals?

  1. Cats and dogs share a common ancestor with each other, but fish and birds do not share a common ancestor with each other.
  2. Cats and dogs share a common ancestor with each other, and fish and birds share a common ancestor with each other, but cats and dogs do not share a common ancestor with fish and birds.
  3. Because cats, dogs, fish, and birds are separate species, none of them shares a common ancestor with any other.
  4. Cats, dogs, fish, and birds all share an ancient common ancestor. 

Distribution of Responses

Chart showing distrubtion of responses for Item EN046003

Percent of students responding correctly

Overall17%
Grades 6–812%
Grades 9–1225%
Male18%
Female15%
Primary Language is English16%
Primary Language is not English19%

View data table