Question

A student wants to develop a model that places bacteria and archaea within the same classification. Which statement provides the BEST evidence that these organisms have common characteristics?
A
Both are unicellular organisms that lack a membrane-bound nucleus.
B
Both are multicellular organisms that lack membrane-bound organelles.
C
Both are unicellular organisms that contain a cell nucleus.
D
Both are multicellular organisms that reproduce asexually.

Answer 1

Answer:

A. Both are unicellular organisms that lack a membrane-bound nucleus.

Explanation:

Bacteria and archaea are both prokaryotes. Prokaryotes are always single celled organisms. They also do not have a defined-nucleus. These features differentiate them from eukaryotes, which all have a membrane-bound nucleus. Some eukaryotes are also multicellular (but not all)