Biology Crossword
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
 
 
Down: 1) similar structures of embryonic tissue5) formaton of a new cell6)  random change in frequences in a population 8) that are reduced forms of fuctional structures in different species 13) features that dont appear in the fossil of common ancsestce 17) large numbers if identical bacteria each containing the inserted DNA molecules Across: 2) nature decides what selection occurs 3) early pre birth stage of an organism development 4) preserved evidence of an organism often found in sedimetary rock that provides evidence of past life7) smiliar in construction but are not inherited by common ancesters9) cummulative changes in groups of organisms through time10) idea that life arises from nonliving things11) the process by which desired traits of a certain plants and animals are selected12) differences amoung individuals in species 14) primitive features that do appear in ancestrol forms 15) 2 closely related organisms are bred to have the desired traits to eliminate the undesired ones 16) technology that involves manipulating the DNA of one organism in order to insert exogerous .18) selective breeding19) join the 2 DNA chemically enzyme normally used by cells in DNA repair and replication
 

 

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