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Quiz on Human Microbiome: Your Body Is an Ecosystem Quiz, created by Saddleback ARC on 27/12/2017.

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Human Microbiome: Your Body Is an Ecosystem Quiz

Question 1 of 5

1

What is an ecosystem?

Select one of the following:

  • an experiment in which people were placed inside a room that was as free of microbes as possible

  • a species of bacteria that can help protect our skin against fungi and yeast but can also cause infections and life-threatening diseases

  • a community of living things that interact with each other and with the non-living things in their environment

  • a group of scientists studying how microorganisms work in our bodies, and learning about the balance among different bacterial communities

Explanation

Question 2 of 5

1

To organize this text, the author divides it into sections with subheadings. What is described in the section with the subheading “You Are an Ecosystem”?

Select one of the following:

  • microbes in and on the human body

  • plants and animals living in the ocean

  • an experiment in which scientists measured bacterial “clouds”

  • the effects of antibiotic drugs on our microbiomes

Explanation

Question 3 of 5

1

Humans and microbes have “complex relationships.”

What information in the article best supports this statement?

Select one of the following:

  • Scientists call bacteria that are harmless to humans “commensal.”

  • Antibacterial hand sanitizers can wipe out all bacteria on a patch of skin.

  • Microbes are the oldest form of life on Earth, having first appeared over 3.5 billion years ago.

  • Some microbes benefit humans, while other microbes harm humans.

Explanation

Question 4 of 5

1

Read these sentences from the text.

“Scientists repeated the experiment many times, and could always tell which room had been occupied. They could measure bacterial ‘clouds’ in the room—bacteria that had come off the person’s body. Because every person’s microbiome is unique, they could also identify different people from their bacterial ‘clouds.’”

Why might the author have placed the word “clouds” in quotation marks?

Select one of the following:

  • to indicate that the word is being used in a different way than usual

  • to quote the scientists who were doing the experiment

  • to express surprise that clouds appeared inside a room

  • to suggest that the measurements recorded by the scientists may not have been accurate

Explanation

Question 5 of 5

1

What is the main idea of this text?

Select one of the following:

  • No two human microbiomes are the same.

  • The human body is a diverse ecosystem made up of microbes.

  • Some bacteria cause infections and even life-threatening diseases.

  • Some scientists think that infants who lack exposure to microorganisms develop a higher rate of allergies.

Explanation

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