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C.3 http://www.bbc.co.uk/schools/gcsebitesize/science/add_gateway_pre_2011/living/genesrev1.shtml

C.4 http://wallace.genetics.uga.edu/groups/evol3000/wiki/ce8b9/Selective_Breeding_or_Artificial_Selection.html

C.5 http://www.actionbioscience.org/biotechnology/sakko.html

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C.8 http://learn.genetics.utah.edu/content/selection/corn/

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C.18 https://www.learner.org/interactives/dna/history.html

C.19 http://www.brighthub.com/science/genetics/articles/27236.aspx

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C.27 http://www.gmo-compass.org/eng/database/plants/21.cotton.html

C.28 http://www.gmocompass.org/eng/regulation/labelling/93.new_labelling_laws_gm_products_eu.html

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