What term describes one-celled microorganisms that can be disease-producing or non-disease-producing?

What term describes one-celled microorganisms that can be disease-producing or non-disease-producing?

• A. Bacteria
• B. Virus
• C. Fungi
• D. Protozoa

Answer: (A)

Bacteria are one-celled microorganisms that can be disease-producing or non-disease-producing. They are microscopic, unicellular organisms with simple cell structure that reproduce by binary fission. Some bacteria are pathogenic, producing toxins or invading tissues to cause infections, while others are harmless or beneficial and form part of the body's normal flora. In nail care, understanding bacteria helps explain why proper sanitation and hygiene prevent infections. Viruses aren’t cells and cannot reproduce on their own; they need a host cell, so they don’t fit the description of a one-celled microorganism. Fungi include many multicellular forms, though some yeasts are single-celled; protozoa are single-celled but have a different cellular organization than bacteria. The term that best matches the description is bacteria.

Bacteria are one-celled microorganisms that can be disease-producing or non-disease-producing. They are microscopic, unicellular organisms with simple cell structure that reproduce by binary fission. Some bacteria are pathogenic, producing toxins or invading tissues to cause infections, while others are harmless or beneficial and form part of the body's normal flora. In nail care, understanding bacteria helps explain why proper sanitation and hygiene prevent infections.

Viruses aren’t cells and cannot reproduce on their own; they need a host cell, so they don’t fit the description of a one-celled microorganism. Fungi include many multicellular forms, though some yeasts are single-celled; protozoa are single-celled but have a different cellular organization than bacteria. The term that best matches the description is bacteria.