Answer: D: it has no effect on genetic variation.
Explanation:
 
        
             
        
        
        
The best improvement to these instructions that Keisha can make 
immediately and easily is to describe where the instructions start from.  
Does the route start from Keisha's house?  From her friend's house?  
From my house ?  
Knowledge of the coordinate reference frame makes a big difference, 
and it's essential.
        
             
        
        
        
Eukaryotic cells contain membrane-bound organelles, such as the nucleus, while prokaryotic cells do not. Differences in cellular structure of prokaryotes and eukaryotes include the presence of mitochondria and chloroplasts, the cell wall, and the structure of chromosomal DNA.
mark me brainliest please!!!
        
                    
             
        
        
        
Answer:
A lot of birds sing or dance to attract their mates or show off their beautiful colors. Fireflies flash their lights to attract females.
Explanation:
See answer above.
If you can please make my answer the brainliest that would be much appreciated. Thanks!