Microorganisms

Antibiotics are made to fight against what type of infectious microorganisms?

• bacterial

• viral

• carcinogenic

• pathogenic

Which of these microorganisms are harmful?

• yeast

• bacteria in yogurt

• fruit mold

How do beneficial microorganisms help in the digestive process?

• It breaks down the food.

• It allows food to be absorbed into the bloodstream.

• Both A and B

Bacteria are an example of an organism so small they can only be seen through microscopes. What are these types of organisms called?

• microorganisms

• extraorganisms

• macroorganisms

• interorganisms

What describes the relationship of microorganisms to humans?

• helpful only

• harmful only

• both helpful and harmful

• neither helpful or harmful

Select three of the following foods that are made with the direct help of microorganisms.

• milk

• cheese

• bread

• yogurt

• steak

READ THE FOLLOWING PASSAGE AND ANSWER THE QUESTION:

Kimora and Mateo add eggs, flour, salt, baking soda, sugar, butter, vanilla, and chocolate chips into a bowl. Mateo mixes the batter because his favorite part of making cookies is licking the cookie batter off of the mixing spoon. When he is finished, Kimora forms the batter into little balls on the cookie sheet. She puts the cookies in the oven to bake for twelve minutes. After the time is up, Mateo pulls the cookies from the oven and allows them to cool. Kimora eats four cookies and Mateo eats two. They are delicious! A couple of hours later, Mateo's stomach starts to hurt. He feels nauseous and dizzy. He is sick for three days after eating the cookies.

Which argument best describes a possible explanation of why Mateo got sick but Kimora did not?

• Mateo ate fewer cookies.

• Kimora ate more cookies.

• There were helpful bacteria in the uncooked batter.

• There were harmful bacteria in the uncooked batter.

Which two arguments support the claim that microscopic algae are beneficial?

• Microscopic algae create oxygen for the atmosphere.

• Microscopic algae keep fish populations under control.

• Microscopic algae can be found in different ecosystems.

• Microscopic algae prevent decaying matter from building up.

• Microscopic algae are a source of energy for other organisms.

Bacteria are single-celled microorganisms that
are present almost everywhere. In human bodies,
some bacteria live in the stomach where they
help to break down food. Which claim does this
evidence BEST support?

Which claim does this evidence BEST support?

• The evidence supports the claim that microorganisms need humans to survive.

• The evidence supports the claim that all microorganisms are harmful.

• The evidence supports the claim that microorganisms do not affect the human body.

• The evidence supports the claim that some microorganisms are beneficial.

A scientist is investigating bacteria by growing it in a petri dish. She introduces a fungus into the petri dish and records her observations. The pictures show the petri dish before and after the fungus was introduced. Which argument is supported by evidence?

• The fungus creates harmful bacteria.

• The fungus kills nearby harmful bacteria.

• The fungus causes harmful bacteria to multiply.

• The fungus is the food source for harmful bacteria.