Which term means an organism of microscopic size?

Which term means an organism of microscopic size?

• A. Microorganism
• B. Bacteria
• C. Parasitic Disease
• D. Inflammation

Answer: (A)

An organism of microscopic size is called a microorganism. This broad term covers any living thing too small to be seen without a microscope, including bacteria, viruses, fungi, protozoa, and algae. It’s the best answer because it directly names the type of living organism that requires magnification to be observed. Bacteria are a subset of microorganisms, so while many microorganisms are bacteria, not all microorganisms are bacteria. Parasitic disease describes a condition caused by a parasite, not the organism itself, and inflammation is a bodily response, not a living organism.

An organism of microscopic size is called a microorganism. This broad term covers any living thing too small to be seen without a microscope, including bacteria, viruses, fungi, protozoa, and algae. It’s the best answer because it directly names the type of living organism that requires magnification to be observed. Bacteria are a subset of microorganisms, so while many microorganisms are bacteria, not all microorganisms are bacteria. Parasitic disease describes a condition caused by a parasite, not the organism itself, and inflammation is a bodily response, not a living organism.