Microorganisms

What are two ways that bacteria help humans?

• helping digest food

• eating dead skin

• making hair shiny and glossy

• stopping tooth decay

What type of disease can you get from fungi?

• measles

• chicken pox

• food poisoning

• athlete's foot

A mosquito bites a human. Several days later the human begins to get sick. What type of microb is LEAST LIKELY causing the illness?

• bacteria

• protists

• fungi

• virus

What are vaccines?

• They are similar to genes because they store energy.

• They kill viruses using antibacterial medicine.

• They are injections of weakened or dead viruses.

• They are widespread infections.

Which microorganisms listed below can be harmful?

• bacteria

• fungi

• protists

• all of the above

Yeast is used for making bread. Yeast is a

• plant.

• spice.

• fungi.

• bacteria.

Identify the true statement below about microorganisms.

• The size of an organism determines its importance in an environment.

• Tiny microorganisms cannot harm or kill larger organisms.

• Humans are unaffected by microorganisms.

• Microorganisms affect every living thing on Earth.

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How do bacteria and fungi help the environment?

• They help us produce proteins.

• They cause "red tides."

• They make bread and cheese.

• They break down dead plants and animals.

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Identify a way that bacteria do NOT enter the human body.

• under the fingernails

• through the stomach

• through the lungs

• cut in the skin

How do viruses cause disease?

• by putting their own DNA in human cells

• by producing toxins that damage tissues

• by causing red tides that contaminate food and water

• with vaccines