Which domain contains organisms that are prokaryotic and unicellular?

• A. Bacteria
• B. Eukarya
• C. Archaea
• D. Protista

Answer: (A)

Verified step by step guidance

1. Step 1: Understand the three domains of life: Bacteria, Archaea, and Eukarya. Each domain groups organisms based on cellular structure and genetics.
2. Step 2: Recall that prokaryotic organisms lack a nucleus and membrane-bound organelles, while eukaryotic organisms have these features.
3. Step 3: Identify which domains contain prokaryotic organisms. Both Bacteria and Archaea are prokaryotic, while Eukarya contains eukaryotic organisms.
4. Step 4: Consider the unicellularity of organisms in these domains. Both Bacteria and Archaea are primarily unicellular, whereas Eukarya includes multicellular and unicellular organisms.
5. Step 5: Conclude that the domain Bacteria contains organisms that are both prokaryotic and unicellular, matching the criteria given in the question.