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10
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list two things for natural selection to happen in a population.
variation, selective pressure, reproduction of organisms
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25
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List 4 causes of genetic variation.
independent assortment of chromosomes, crossing over, random fusion of gametes, mutations
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banana
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fairy
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25
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gift
Win 25 points!
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thief
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15
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What is an environmental factor that affects the chance of survival of an organism called?
selection pressure
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20
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an increased ability to survive and grow well, as a result of outbreeding and therefore increased heterozygosity is called ....
hybrid vigour
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10
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What is the ability of an organism to survive and reproduce called?
fitness
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15
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Selectively bred animals are healthier than the others. True or false
False
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15
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What does the image show? A plant only, an animal only or a plant and an animal together
A plant only (a fly orchid)
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10
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Genes have no effect on continuous variation. True or false?
False
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trap
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seesaw
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rocket
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thief
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25
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thief
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magnet
Take 15 points!
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fairy
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baam
Lose 15 points!
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10
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Which type of graph is used to show discontinuous variation data?
bar graph
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15
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What is the selective pressure in the industrial melanism example?
predator/birds
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10
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Both natural and artificial selection result in changes to phenotype. Always true, sometimes true or never true?
Always true
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15
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a loss of the ability to survive and grow well, due to breeding between close relatives is called ....
inbreeding pressure
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15
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the complete range of DNA base sequences in all the organisms in a species or population
gene pool
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