The Cell System

All cells are produced ____________.

• from nothing
• from other cells

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______________ are the basic unit of living things.

• Kittens
• Organisms
• Cells
• Organelles

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 Cell Theory states: "All living things are made up of cells."

• True
• False

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When observing cells, which of the following optical tools is most appropriate?

• Hand lens
• Telescope
• Petri dish
• Microscope

Which of the following is NOT one of the three parts of Cell Theory?

• All living things are made of cells.
• The cell is the smallest living thing that can perform all the functions of life.
• Cells are too small to see without a microscope.  
• All cells must come from pre-existing cells.

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The basic unit of life is called a (n)

• atom
• compound
• cell
• energy

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Rocks are not living because

• they never move
• they aren't needed for humans
• they are not made of cells
• they don't break down

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How are unicellular organisms different from multicellular organisms? 

• There are no differences.
• They are made of many cells. 
• They are only classified as prokaryotes.
• They are made of only one cell. 

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Which are found in only photosynthetic cells? 

• chloroplast and chlorophyll
• mitochondria and chloroplast
• nucleus and mitochondria
• nucleus and chlorophyll

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All cells come from pre-existing cells. This statement is part of cell theory. 

• True 
• False

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