Gene therapy affects a cell by A) Cells with functioning genes are replaced with mutated genes.
        
                    
             
        
        
        
The rat. I don't know if you meant zodiac ANIMAL or astrology sign like aquaris for example. however the rat zodiac animal is defined as the weakest of all the zodiac animals.
Have a Merry Christmas,
Miri
 
        
                    
             
        
        
        
Adaptation? Their size plays a role in this, and size is sometimes an adaptation.
        
             
        
        
        
The highest level of organization for living things is the biosphere; it encompasses all other levels. The biological levels of organization of living things arranged from the simplest to most complex are: organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere.