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Evolution



                                    1                          
                                                               
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                                                  4            
                                                               
                                                               
                                                               
                            5                                  
                                                               
                  6                                            
                                                               
                                                               
                                                               
                      7                                        
                  8                                            
                                                               
                      9                                        
                                                               
                10                                              
                                                               
                    11                                          
                                                               
                                                               
                                                               
                    12                                          
                                                               
              13                                                
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                    15                                          
                                                               
              16                                                
                                                               
17                                       18                      
                                                               
      19           20                                            
                                                               
                                                               
                                                               
                                                               
                                                               
                                                               
                                                               
Across Down
8 is a type of natural selection in which genetic diversity decreases as the population stabilizes on a particular trait value
9 process by which descendants of ancestral organisms spread into various habitats and accumulate adaptations to divers ways of life
11 particular mode or mechanism of natural selection
12 selective breeding of domesticated plants and animals to produce offspring with desired genetic traits
13 process in which unrelated species from similar environments have adaptions that seem very similar
15 is a descriptive term used to describe changes in population genetics that simultaneously favor individuals at both extremes of the distribution
16 remnant of a structure that may have had an important function in a species' ancestors, but has no clear function in the modern species
17 similarities among unrelated species that result from convergent evolution
19 similar structure found in more than one species that share a common ancestor
1 process by which individuals with inherited characteristics well-suited to the environment leave more offspring than do other individuals
2 evolution on the smallest scale—a generation-to-generation change in the frequencies of alleles within a population
3 evolution from a common ancestor of many species adapted to diverse environment
4 change in the gene pool of a population due to chance
5 all of the alleles in all the individuals that make up a population
6 contribution that an individual makes to the gene pool of the next generation compared to the gene pool of the next generation compared to the contribution of the other individuals
7 condition that occurs when the frequency of alleles in a particular gene pool remain constant over time
10 inherited characteristic that improves an organism's ability to survive and reproduce in a particular environment
14 descent with modification; generation to generation changing the proportion of different inherited genes in a population that accounts for all of the changes that have transformed life over an immense time
18 difference among members of a species
20 exchange of genes between populations
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