Answer:
is there a multiple choice?? or anything 
 
        
             
        
        
        
Pulmonary vein. It enters your pulmonary vein and then enters your left atrium.
I hope that helped :)
 
        
             
        
        
        
Is composed of G1 phase<span> (</span>cell<span> growth), followed by S </span>phase<span> (DNA synthesis), followed by G2 </span>phase<span> (</span>cell<span> growth). At the end of interphase comes the mitotic </span>phase<span>, which is made up of mitosis and cytokinesis and leads to the formation of two daughter </span>cells<span>.
</span>
hope helps>
        
                    
             
        
        
        
Decomposers do.
i wish that helped you
        
             
        
        
        
1. Well developped offspring, and portable baby food despencing. Mamalian young are generally quite well developed when they are born, and the parent does not need to find any specific types of food for the new born since the mother already provides te perfect nutrition. 
2. Internal heating allows mammals to remain quick and active in cold climates. 
3. Fur is really effective and cheap to produce.