Which term describes a living thing that is too small to be seen without a microscope?

Which term describes a living thing that is too small to be seen without a microscope?

• A. Microorganism
• B. Amoebas
• C. Algae
• D. Virus

Answer: (A)

A microorganism is a living thing that is so small you need a microscope to see it. This broad term includes many tiny living organisms, such as bacteria and protozoa, and microscopic algae. Amoebas and algae are examples of microorganisms, but the general category that describes all of these tiny living things is the term microorganism. Viruses, while extremely small, are often not considered living because they cannot carry out life processes on their own, so they don’t fit the “living thing” idea in the same way.

A microorganism is a living thing that is so small you need a microscope to see it. This broad term includes many tiny living organisms, such as bacteria and protozoa, and microscopic algae. Amoebas and algae are examples of microorganisms, but the general category that describes all of these tiny living things is the term microorganism. Viruses, while extremely small, are often not considered living because they cannot carry out life processes on their own, so they don’t fit the “living thing” idea in the same way.