Answer:
They pick up oxygen from the lungs and drop off oxygen to the cells through the capillaries
 
        
                    
             
        
        
        
<span>Helium nuclei have a positive charge of 2+ when observed. Compared to a hydrogen nuclei, we can see that the Helium nuclei is more difficult to fuse as it has a greater charge than Hydrogen 1+. This chemical difference makes the answer true.</span>
        
             
        
        
        
Answer:
C
Explanation:
Genes, choromosomes, and the nucleus (contains the DNA) are all apart of genetics.
 
        
                    
             
        
        
        
House sparrows in the northern part of North America are larger than those found in the southern regions. The possible mechanism of microevolution is more likely to be responsible for this is natural selection. The answer would be letter B.
        
                    
             
        
        
        
Answer:
b 
Explanation:
cuz that is what they normally eat so sorry if it's wrong