Science words 9 Crossword
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
 
 
Down: 1)  change that affects the sequence of nitrogenous bases in DNA2) a thick layer that regulates materials that can enter and leave the nucleus3) a relationship mutually beneficial to both organisms4) a small dense region within the nucleus where ribosomes are assembled5) a genetic cross in which only one trait is studied6) the process by which certain soil bacteria break down nitrogen gas and nitrogen found in dead organic matter into either nitrate or ammonia7) made of many cells10) a large, complex molecule made of carbon, hydrogen, oxygen, nitrogen, and phosphorus11) a single sugar molecule Across: 2) a failure of chromosomes to separate correctly during the production of gametes8) a resource that cannot be replaced, such as fossil fuels9) a pathway for the movement of the element nitrogen among earths living organisms, waters, rocks and atmosphere12) the study of the cell's chemical processes13) survival of the fittest, a theory by charles darwin14) the sum of all activities and interactions a species has, both with living and nonliving things that determine where it can survive and grow
 

 

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