Answer:
Figure 3 is more helpful than figure 2 since it shows a clearer trend in the data, while figure 2 does not.
Explanation:
 
        
             
        
        
        
I'm pretty sure it's polyploidy 
        
             
        
        
        
The Kinetic energy is 345,600 J
=1/2^2
        
             
        
        
        
Answer:
The cilia is one of the things that act defensively in the respiratory system. 
Explanation:
It propels a mucus-like liquid that covers the airway which traps pathogens (potentially infectious microorganisms) and other particles, preventing them from reaching the lungs.
 
        
             
        
        
        
 Answer: number 1
Explanation: that is when we could first sustain life because that is when we gained atmosphere and when we could hold carbon and oxogen