Question

Which of the following provides the best justification for the contention that Archaea are more closely related to Eukaryota than they are to Bacteria?

Multicellular organisms are found in both Archaea and Eukaryota but not in Bacteria.

Cell membranes with ester-linked fatty acids are found in both Archaea and Eukaryota but not in Bacteria.

The composition of cell walls is similar in Archaea and Eukaryota but not in Bacteria.

The single-celled prokaryotic cells of Archaea and Eukaryota are visually similar, but Bacteria is not.

Answer 1

A) Both Archaea and Bacteria are strictly unicellular (though some bacteria form fairly complex colonies).
B) This is the case. Both Archaea and Eukaryota use ester linkages.
C) Cell walls in Eukarya (where present) are quite diverse and are distinct from the cell walls of both Archaea and Bacteria
D) Archaea look nothing like Eukaryotes and resemble bacteria quite strongly.