answers with solutions 2025
Monocultures - O
ANSWER producing or growing a single crop, plant, or livestock, species, variety, or breed in a fi
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eld or farming system at a time EX: corn, wheat, rice
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Polycultures - ANSWER Growing more than one crop in the same place simultaneously
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What has modern plant breeding done to diversity? - ANSWER It has reduced diversity
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Diversity can arise through what? -
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ANSWER Homogenization and standardization through hybridization, asexual reproduction, and
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cloning
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Fitness - ANSWER the proportional contribution of an individual to future generations
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What is natural selection? -
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OANSWER differential success of individuals within the population that results from their interact
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ion with the environment
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What is artificial selection? -
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OANSWER modification of a species by human intervention so that certain desirable traits are rep
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resented in future generations EX: different dog breeds derive from artificial selection
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What are some of the downsides to artificial selection? - ANSWER lack of diversity of species-
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a certain species can go extinct due to lack of diversity EX: Irish potato famine-
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potatoes went extinct because there was only one species of potato EX: Cavendish banana-
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disease is killing them off because they are not diversified
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, What are white-feathered turkeys bred for? What about red-bourbon turkeys? -
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ANSWER high production; retain their ability for natural self survival and flight
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Selective Breeding VS Genetic Engineering -
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ANSWER Selective Breeding: takes years to decades; sexually compatible lineages (related speci
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es)
Genetic Engineering: takes days to weeks; unrelated species used
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What is one example of genetic engineering? -
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OANSWER Spider Goat example: Nexia Biotech genetically engineered spider genes into goats. Th
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e milk of the kids (baby goats) carry extra proteins which can be spun into spider silk, one of the
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strongest substances known to man, and can be used to make biosteel
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Genetically Modification - O O
ANSWER taking a gene from a cell of one species and inserting it into another
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What does the GMO process look like? -
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OANSWER use enzymes to cut gene segments from species A and enzymes to insert genes to spe
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cies B O
Glofish (GMO example) -
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ANSWER sea anemone gene spliced into zebrafish to allow fish to glow in the dark; created a ge
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netically distinct organism
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GMO - ANSWER genes artificially moved into genome
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Cisgenic - ANSWER genes taken and implanted from related species
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Transgenic - ANSWER genes taken and implanted from unrelated species
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