Beneficial and Harmful Microorganisms

Which is not an example of a helpful microorganism?

• Yeast to help bread rise

• A virus used in a vaccine

• Microbes used to clean oil spills

• Bacteria that causes strep throat

Four students in Mrs. Sterling's class make the following observations.  Choose which student is correct

• Shelby says that all microorganisms are found in the ocean.  Some are helpful, but some are harmful.  It's best to shower after swimming at the beach.

• Garry says that all microorganisms are harmful.  This is why we must get vaccinations and antibiotics from the doctor.

• Ireland says that some microorganims are helpful and some are harmful.  The best way to protect ourselves from harmful microbes is to wash our hands with soap and water.

• Jonathan says it's impossible to become sick from bacteria.  Only viruses and fungi can make a person sick.  Make sure to sneeze in your elbow to prevent the spread of germs.

______________ helps us  digest our food and they produce needed vitamins.

• Bacteria

• Fungi

• Protozoa

• Algae

Yogurt and cheese  can be produced from ___________.

• Bacteria

• Virus

• Protozoa

• Algae

Bacteria is known as ______________ in an ecosystem when feeding on dead organisms.

• decomposers

• herbivores

• pathogens

• infections

Tags

NGSS.MS-LS2-3

Another word used for microorganisms is ...

• Microbe

• mitochondria

• animal

• insect

If you were to grab a handful of soil there would be ______ of bacteria living in it.

• millions

• hundreds

• no

• billions

Which of the following microorganisms is used in the production of antibiotics?

• A) Penicillium

• B) Escherichia coli

• C) Lactobacillus

• D) Streptococcus

What role do nitrogen-fixing bacteria play in agriculture?

• A) They decompose organic matter.

• B) They convert atmospheric nitrogen into a form usable by plants.

• C) They cause plant diseases.

• D) They produce oxygen through photosynthesis.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which microorganism is commonly used in the fermentation process to make bread rise?

• A) Bacteria

• B) Yeast

• C) Virus

• D) Algae