Microorganisms

Which of these microorganisms are harmful?

• yeast

• bacteria in yogurt

• fruit mold

"Red Tide" is helpful to fish.

• True

• False

How do beneficial microorganisms help the digestive process?

• It breaks down the food.

• It allows food to be absorbed into the bloodstream.

• Both A and B

Harmful microorganisms can be controlled by _____________.

• Washing hands with water.

• Washing hands with soap and water.

• Not covering your nose when you sneeze.

• Sharing food.

Most microorganisms cannot be seen without a ____________.

• telescope

• perscope

• microscope

How can algae be harmful?

• They are used in jellies.

• Algae blooms float on the ocean's surface

• They are used in toothpaste.

• They are oxygen producers.

How can microorganisms be harmful?

• They help plants take up nutrients from the soil.

• Tiny fish eat them in the ocean.

• Some of them cause fatal diseases.

• Millions of them can live in a handful of soil.

Which is NOT a way that bacteria can be beneficial?

• Bacteria help turn milk into yogurt.

• Bacteria in the human gut help with digestion.

• Bacteria evolve and become resistant to antibiotics.

• Bacteria help create soil by aiding decomposition.

Which argument best describes how some bacteria are beneficial to these forests?

• Bacteria prevent the trees from losing leaves.

• Bacteria develop into new leaves for the trees.

• Bacteria provide food for the leaves on the ground.

• Bacteria break down fallen leaves to release nutrients.

Some beneficial bacteria live inside the human digestive tract. How do these bacteria MOST help the body function?

• They help produce energy from food eaten.

• They help digest food in the intestines.

• They help neutralize toxins present in food.

• They help to liquefy food in the esophagus.