The common ancestor of all three domains of life probably had
A) membrane-bound organelles.
B) a nucleus.
C) a Golgi apparatus.
D) operons.
E) a circular chromosome.

Question

Quizplus · Accepted Answer

All three domains of life (Bacteria, Archaea, and Eukarya) have circular chromosomes, suggesting that their common ancestor had a circular chromosome. There is no evidence to suggest that their common ancestor had membrane-bound organelles, a nucleus, a Golgi apparatus, or operons.

The Common Ancestor of All Three Domains of Life Probably