Microbiomes Chapter 1

the basic unit of structure and function in living things.

• antibiotics

• scale

• cells

• researchers

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Which is larger: cells or molecules?

• cells

• molecules

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Which of these units of measure is the largest?

• centimeter

• micrometer

• nanometer

• meter

Some organisms are made of just one cell.

• True

• False

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Different microorganisms can be different sizes.

• True

• False

Which one of these things is NOT microscopic?

• yeast cell

• molecule

• grain of salt

• blood cell

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Micrometers are a ____ times smaller than a meter

• two

• thousand

• hundred thousand

• million

What is the basic unit of length/distance?

• gram

• liter

• meter

• second

What does the prefix milli- mean?

• 1 million

• 1 millionth

• 1 thousandth

• 1 thousand

Which prefix means 1000?

• hecto-

• kilo-

• centi-

• micro-