Evolution Test Crossword
                  
                  
                  
                  
                  
                  
                  
                  
                  
                  
 
 
Down: 1) Any inherited trait that gives an organism and advantage in its particular environment.2) The process though which species change over time3) Remains of organisms preserved in the Earth.4) A segment of DNA that relates to a specific trait or function of an organism. Across: 5) Several periods when huge numbers of species have died or become extinct in a very short time.6) Physical structures that were fully developed and functional in an ancestral group of organisms but are reduced and unused in the later species.
 

 

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