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Review

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Term
Definition
Carbohydrates   organic compound containing carbon, hydrogen, and oxygen.  
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Lipids   hydrophobic biological molecule composed mostly of carbon and hydrogen; fats, oils, and waxes.  
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Proteins   organic compound made of amino acids joined by peptide bonds; primary building block of organisms.  
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Double Helix   The shape of DNA molecule resembles a spiral staircase. This structure is usually called what?  
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Homeostasis   regulation of an organism's internal environment to maintain conditions needed for life.  
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Nucleic Acids   complex macromolecule that stores and communicates genetic information. it is made of carbon, nitrogen, oxygen, phosphorus, and hydrogen.  
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Adenine to Thymine and Guanine to Cytosine   Who are the base pairs of DNA?  
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Symbiosis   the relationship between two organisms in a community.  
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Parasitism   the relationship between two organisms in which one benefits at the expense of the other  
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Commensalism   the relationship between two organisms where one organism benefits from the other without affecting it.  
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Mutualism   Mutualistic relationship between two organisms in which both benefit from each other.  
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Decomposer   An organism, like bacteria, that breaks down dead plant or animal and releases their nutrients back into the soil.  
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Nitrogen fixing bacteria   Bacteria in the soil that produce ammonium  
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Denitrifying bacteria   Bacteria that turns nitrites or nitrates into nitrogen gases  
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