In "Part 3: Domains & Kingdoms," fill in the chart for the groups Archaea and Bacteria by stating whether each is a prokaryote or eukaryote and giving one example organism for each.

What the chart is asking you to identify

You are filling two facts for each group (Archaea and Bacteria): (1) whether it has prokaryotic or eukaryotic cells, and (2) one real organism that belongs to that group.

Prokaryote vs. eukaryote, the quick test

A cell is prokaryotic if it has no nucleus and no membrane-bound organelles. A cell is eukaryotic if it does have a nucleus and membrane-bound organelles.

Filling in “Archaea”

• Prokaryote or eukaryote? Prokaryote
• Example organism: a methanogen (for example, $\textit{Methanobrevibacter}$) or a halophile (salt-loving archaeon)

Archaea are single-celled organisms that look like bacteria in cell structure (no nucleus), even though they are genetically distinct from bacteria.

Filling in “Bacteria”

• Prokaryote or eukaryote? Prokaryote
• Example organism: $\textit{Escherichia coli}$ (E. coli)

Bacteria are also single-celled prokaryotes. Many familiar microbes, including E. coli and Streptococcus, are bacteria.

Completed chart (one correct set of answers)

• Archaea: Prokaryote; Example: methanogen ($\textit{Methanobrevibacter}$)
• Bacteria: Prokaryote; Example: $\textit{E. coli}$