Microorganisms: Friend and Foe

Name the groups in which microorganisms are broadly classified.

• yeast

• fungi

• protozoa

• algae

Microorganisms are classified into _______major groups

Another name for a microorganism is __________

Bacteria and yeast are alsohelpful for __________of rice idlisand dosa batter

Beneficial or Harmful?

Plankton are a food source for small fish

• beneficial

• harmful

What are bacteria that cause disease?

• viruses

• pathogens

• endospores

• antibiotics

Assertion: Adding salt preserves the meat and fish for ages.

Reason: Salt draws water out of food and dehydrates the food.

• Both A and R are true and R is the correct explanation of A.

• Both A and R are true but R is not the correct explanation of A.

• A is true but R is false. A is false but R is true.

• Both A and R are false.

Penicillin is a

• Algae

• Fungus

• Vaccine

• Bacteria

Viruses have all cell organelles present in them.

• True

• False

Beneficial or Harmful?

yeast used to cause bread to rise

• beneficial

• harmful