5. what is the evolutionary relationship among archaea, bacteria, and eukarya?
a. since archaea are the most primitive, archaean ancestors gave rise to bacteria
that in turn gave rise to eukaryotes.
b. all three domains are equally distant from the most primitive common ancestor,
a protocell.
c. archaea and eukarya share nucleic acid similarities so eukarya split off from
archaea.
d. bacterial ancestors gave rise to both archaea and to eukaryotes as two
separate side branches.
e. archaea ancestors gave rise to both bacteria and to eukaryotes as two separate
side branches.