To learn more about the last common ancestor of all living things,scientists studied the genes that bacteria and ________ share.
A) archaea
B) alga
C) protista
D) animals
E) plants

Question

To learn more about the last common ancestor of all living things,scientists studied the genes that bacteria and ________ share.  
A) archaea
B) alga
C) protista
D) animals
E) plants

Quizplus · Accepted Answer

Bacteria and archaea are both prokaryotic organisms and are believed to have diverged from a common ancestor around 4 billion years ago. By comparing the genes that they share, scientists can learn more about what their last common ancestor might have looked like. Algae, protista, animals, and plants are all eukaryotic organisms and are not as closely related to bacteria as archaea are.

To Learn More About the Last Common Ancestor of All