Evolution and natural selection

Evolution typically happens...

• in a few weeks
• over millions of years
• never
• in 100 years

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Bird's beaks evolve mainly due to the type of ___________________ available.

• food
• water
• shrubs
• mates

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If an organism can't adapt fast enough, this might happen.

• hibernate
• stay the same
• live longer
• become extinct

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Darwin said that within a species there will be _________________________

• nothing different
• variation/differences

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Organisms with differences/variations that are helpful will ______________________

• live longer
• become extinct
• show no change

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What can happen to a species over time if some of the organisms have an advantage?

• The population will decrease
• The population will become extinct
• The population will slowly increase

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The change over time in populations of related species.

• biological evolution
• transition
• variation
• adaptation

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A slight difference in an inherited trait between individual members of the same species.

• variations
• adapatations
• homologous structures
• analogous structures

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When an organism of a species is born with a variation in a trait that gives it an advantage in its environment, we call that trait an adaptation.

• true
• false

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When an organism of a species has an adaptation, it will compete for resources better, survive longer and pass that adaptation on to it's offspring. This process is called

• evolution by natural selection
• artificial selection
• inbreeding
• outbreeding

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