Answer:
The anaswer to your question about fossils is your work.
Explanation:
 
        
             
        
        
        
Our ears use vibrations to detect sound. 
Inside our ears we have an eardrum, this eardrum is connected to three small bones known as Ossicles. When something makes a sound is creates a vibration that makes the eardrum vibrate and pass this vibration through the Ossicles to the Co<span>chlea which allows us the comprehend the sound something is making.
I hope this helped. Have a great day!</span>
        
             
        
        
        
Answer:
Mitochondrial DNA is the DNA located in mitochondria, cellular organelles within eukaryotic cells that convert chemical energy from food into a form that cells can use, adenosine triphosphate.
Explanation:
 
        
             
        
        
        
Answer:
Hemophilia is a sex-linked recessive disorder in which a person's blood do not clots and he can bleed to death even after minor injuries because blood will keep running due to a small cut.
It is a recessive trait which means that even if one normal gene is present along with Hemophiliac gene, the person will not have the disease and he will be the carrier.
Question: What will be their children’s possible phenotypes?
If a woman who is a carrier for hemophilia marries a hemophiliac man, their genotypes can be denotes as :
Here H, indicate normal gene and small h indicate defected (hemophilia) gene. 
Parents:                      XHXh                   X           XhY
Offspring:                   XHXh : XHY:  XhXh:  XhY
Phenotype of offspring: 
XHXh:  The child will be daughter and normal (25 % chances)
XHY:     The child will be son and normal (25 % chances)
XhXh:   The child will be girl and Hemophiliac (25 % chances)
XhY:      The child will be son and Hemophiliac (25 % chances)
Hope it helps!
 
        
             
        
        
        
Bacteria, hope this helps!