Which term is the broad category of tiny living things that require a microscope to see?

Which term is the broad category of tiny living things that require a microscope to see?

• A. Virus
• B. Microorganism
• C. Algae
• D. Harmful Microorganisms

Answer: (B)

Microorganisms are tiny living things that are so small you need a microscope to see them. This broad category includes bacteria, yeasts, protozoa, and many types of algae, as well as other microscopic living forms. The question asks for a term that covers all of these tiny living things, so the best choice is microorganisms. A virus, while extremely small, isn’t always considered living because it can’t carry out life processes on its own and must use a host cell to reproduce, so it doesn’t fit the idea of a living organism on its own. Algae are a specific type of microorganism, not the broad umbrella term. Harmful microorganisms refers to only the subset that can cause disease or spoilage, not all tiny living things.

Microorganisms are tiny living things that are so small you need a microscope to see them. This broad category includes bacteria, yeasts, protozoa, and many types of algae, as well as other microscopic living forms. The question asks for a term that covers all of these tiny living things, so the best choice is microorganisms.

A virus, while extremely small, isn’t always considered living because it can’t carry out life processes on its own and must use a host cell to reproduce, so it doesn’t fit the idea of a living organism on its own. Algae are a specific type of microorganism, not the broad umbrella term. Harmful microorganisms refers to only the subset that can cause disease or spoilage, not all tiny living things.