Which of the following characteristics is typical of organisms in the domain Bacteria?

• A. They are exclusively multicellular organisms.
• B. They possess peptidoglycan in their cell walls.
• C. Their genetic material is enclosed within a nuclear membrane.
• D. They contain membrane-bound organelles such as mitochondria.

Answer: (B)

Verified step by step guidance

1. Understand the three domains of life: Bacteria, Archaea, and Eukarya, and their key distinguishing features.
2. Recall that organisms in the domain Bacteria are prokaryotes, meaning they lack a true nucleus and membrane-bound organelles.
3. Identify that a hallmark feature of bacteria is the presence of peptidoglycan in their cell walls, which provides structural support and shape.
4. Recognize that multicellularity is not typical of bacteria; most are unicellular, unlike many eukaryotes.
5. Note that genetic material in bacteria is not enclosed within a nuclear membrane, and they do not have organelles like mitochondria, which are characteristic of eukaryotic cells.