Question

select all that apply
select the four characteristics that are most common in domain bacteria.

usually single - celled
lack cell membranes
lack a nucleus
lack membrane - bound organelles
lack ribosomes
peptidoglycan cell wall

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Explanation:

1. Usually single - celled: Bacteria are prokaryotes and most of them exist as single - celled organisms.
2. Lack a nucleus: Bacteria are prokaryotic cells, and prokaryotes do not have a membrane - bound nucleus.
3. Lack membrane - bound organelles: Prokaryotic cells (like bacteria) do not have membrane - bound organelles such as mitochondria, endoplasmic reticulum etc.
4. Peptidoglycan cell wall: Most bacteria have a cell wall composed of peptidoglycan, which is a characteristic feature of the domain Bacteria.

• "Lack cell membranes" is incorrect because all cells (including bacterial cells) have a cell membrane.
• "Lack ribosomes" is incorrect because bacteria have ribosomes (70S ribosomes) for protein synthesis.

Answer:

• Usually single - celled
• Lack a nucleus
• Lack membrane - bound organelles
• Peptidoglycan cell wall