What are bacteria?

What are bacteria?

• A. Multicellular organisms
• B. Viruses
• C. One celled microorganisms that have both plant and animal characteristics
• D. Prions

Answer: (C)

Bacteria are single-celled microorganisms that lack a true nucleus (prokaryotes). This makes them fundamentally different from multicellular organisms, viruses, and prions. The key point is that bacteria are one-celled entities, whereas multicellular organisms are made of many cells, viruses are not cells at all and require a host to replicate, and prions are simply misfolded proteins. Some bacteria can perform photosynthesis or rely on organic material, but their defining trait for this question is being one-celled microorganisms.

Bacteria are single-celled microorganisms that lack a true nucleus (prokaryotes). This makes them fundamentally different from multicellular organisms, viruses, and prions. The key point is that bacteria are one-celled entities, whereas multicellular organisms are made of many cells, viruses are not cells at all and require a host to replicate, and prions are simply misfolded proteins. Some bacteria can perform photosynthesis or rely on organic material, but their defining trait for this question is being one-celled microorganisms.