Science3.6 Crossword
                    
                    
                    
                    
                    
                    
                    
                    
                    
                    
                    
                    
                    
                    
                    
                    
                    
 
 
Down: 1) animal that usually has hair and feeds milk to its young2) ogans for breathing found in fish and amphibians3) the cause of a behavior4) one of a large group of animals with backbones that live part of their lives in water and part in land6) to shed an animas outer covering7) way a living thing acts11) a simple automatic behavior Across: 5) behavior caused by a stimulus8) the main bone that runs along the middle of the back on some animals9) behavior an animal is born with10) an animal with a backbone that has dark, scaly skin12) hard outer covering that supports and protects some animals without backbone
 

 

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