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modify – v. to change some parts while not changing other parts
photosynthesis – n. the process plants use to make food using sunlight, carbon dioxide and water
yield – n. the amount of something produced by a plant or farm
efficiency – n. the ability to do something or produce something without wasting materials, time or energy
transgenics – n. biotechnology that involves producing plants, animals or foods into which genes from another species have been incorporated
impressive – adj. deserving attention, admiration or respect
