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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.