Humans have about ____,000,000,000,000 (trillion) cells in our bodies

• 100

• 200

• 300

• 400

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During "consider the following", Bill explains that cell membrane is from an old word meaning thin _____

• air

• hide

• shell

• skin

During the "cool scientist" segment, she is looking at a small animal that eventually becomes a _____

• butterfly

• spider

• moth

• fly

_____ is your body's fastest growing organ

• heart

• skin

• brain

• liver

Your _____ tells your cells what to do

• heart

• stomach

• head

• genes

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Parts of your _____ molecules are what we call your genes

• pants

• proteins

• DNA

• hemoglobin

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Most cells are very tiny, however they can also be as large as a ______

• heart

• egg

• eye

• tooth

____ cells are the only cells inside of us that we never replace

• bone

• skin

• heart

• nerve

Cells and bricks are alike except cells are alive and __________

• dance

• eat

• reproduce

• move

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All of the following have cells except

• a sea sponge

• a potato

• people

• a piece of sponge cake

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