are molecules made from repeating units of identical or nearly identical compounds called monomers that are linked together by a series of covalent bonds
Polymers
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The measure of concentration of H+ in a solution
pH
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A cell was first discovered by
Robert hook
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thief
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gift
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gift
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banana
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What kind of diffusion that substances uses transport proteins to move the substance across the plasma membrane
Facilitated diffusion
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He was the first to observe a living cell
Anton Van leeuwenhoek
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organisms with only one cell are called .........................
unicellular
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kind of transport that diffuse down concentration gradient From (high) concentration to (low) concentration
Passive transport
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provides the starting point for other necessary lipids such as vitamin D and the hormones estrogen and testosterone
Cholesterol
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what did robert hook use to observe the cell ................
cork
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boom
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shark
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lifesaver
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it exists in the hard-outer shells of shrimp, lobsters, and some insects
Chitin
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baam
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What are the principles of the cell theory ?
All living organisms are composed of one or more cells , Cells are the basic unit of structure of all living organisms , Cells arise only from previously existi