Analysis of Genomes of Modern Species Indicates That the First

Question

Analysis of genomes of modern species indicates that the first cells were similar to existing ____.  
A) viruses
B) fungi
C) prokaryotes
D) eukaryotes
E) algae

Accepted Answer

Analysis of genomes of modern species suggests that the first cells were similar to prokaryotes, which are single-celled organisms lacking a nucleus and other membrane-bound organelles. This is supported by the fact that modern bacteria and archaea, both types of prokaryotes, are the most genetically similar to the ancestors of all cellular life.