What must exist within a population in order for evolution by natural selection to occur,and what are its sources?
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Q1: Natural selection acts on _,while _ evolve.
A)populations;
Q2: _ are stretches of DNA that influence
Q3: When the next ice age comes,species that
Q5: The more genetically diverse a population is,the
Q6: The two main sources of genetic variation
Q7: Which of the following can make a
Q8: Different versions of genes in a population
Q9: Which type of natural selection would favor
Q10: On the Galápagos Islands,the finches that Darwin
Q11: An owl population moves into an area
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