Chapter 21 section 3 Crossword
                         
                         
                         
                         
                         
                         
                         
                         
                         
                         
                         
                         
                         
                         
                         
                         
                         
                         
 
 
Down: 1) a relationship in which one organism lives on or in a host and harms it.2) a close relationship between two organisms of different species that benefits at least one of the organisms.3) an interaction in which one organism kills another for food.5) the organism that benefits by living on or in a host in a parasitism interaction.6) the organism that does the killing in a predation interaction.7) the struggle between organisms to survive as they attempt to use the same limited resource.10) the role of an organism in its habitat, or how it makes its living.12) a close relationship between organisms of two species in which both organisms benefit. Across: 4) an organism that is killed and eaten by another organism.8) a behavior or physical characteristic that allows an organism to survive or reproduce in an environment.9) a relationship between two species in which one species benefits and the other is neither helped nor harmed.11) the organism that a parasite or virus lives in or on.13) individuals whose unique characteristics are best suited for their environment tend to survive and produce offspring. This is the name of the process.
 

 

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