Answer:
Explained below 
Explanation:
1) Olfactory nerves are responsible for our sense of smell while auditory nerves are responsible for our sense of hearing.
2) Olfactory nerves are the shortest nerves and are those that enter the skill through the cribform plate from the ethmoid zone while auditory nerves is one out of two parts of the vestibulocochleer which is described as a cranial nerve that's present in amniotes. The other part is the vestibular nerve. 
 
        
             
        
        
        
Answer:
They lose their end walls so the xylem forms a continuous, hollow tube. They become strengthened by a substance called lignin . Lignin gives strength and support to the plant.
 
        
             
        
        
        
Answer:
b. they present different traits
Explanation:
they are diffrent because heterozygous isnt allways the same.
 
        
             
        
        
        
Answer:
C.
The total mass of the particles in the system stays the same.  sorry if i am wrong
Explanation:
 
        
             
        
        
        
I believe the answer is A