Biology Crossword
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
 
 
Down: 1) the process by which desired traits of a certain plants and animals are selected2) preserved evidence of an organism often found in sedimetary rock that provides evidence of past life3) idea that life arises from nonliving things4) join the 2 DNA chemically enzyme normally used by cells in DNA repair and replication 6) features that dont appear in the fossil of common ancsestce 7) that are reduced forms of fuctional structures in different species 8) nature decides what selection occurs 10) differences amoung individuals in species 11) primitive features that do appear in ancestrol forms 14) 2 closely related organisms are bred to have the desired traits to eliminate the undesired ones Across: 5) selective breeding9) technology that involves manipulating the DNA of one organism in order to insert exogerous .12) early pre birth stage of an organism development 13) similar structures of embryonic tissue15) smiliar in construction but are not inherited by common ancesters16)  random change in frequences in a population 17) cummulative changes in groups of organisms through time18) large numbers if identical bacteria each containing the inserted DNA molecules 19) formaton of a new cell
 

 

Create your own Crossword Puzzle for Free!		  Show Errors as I Type