I believe it's feeding relationships between different organisms
        
                    
             
        
        
        
Answer:
Bipedalism freed the hands so they could be used to cart food,  make and use weapons and other advantages of freed hands.  Bipedalism is a much more efficient way to walk and run and this  fact is quantified.  Bipedalism raised the early proto-human above the horizontal so  he could see predators approaching.  Bipedalism is a much more efficient design to cool down  overheating bodies.
your welcome :)
 
        
             
        
        
        
RR x rr 
or if you're using the letter "t" to represent the alleles TT x tt
Homozygous means that a particular gene has identical alleles on both chromosomes. TT is for a dominant (stronger) trait and tt is for a recessive (weaker) trait.
Hope this helps! :)
 
        
             
        
        
        
Answer:
Are you asking what factors effect mutation rate?
If you are could you be a little more specific because technically even you just damaging tissue increases the likelihood of a mutation occurring due to mitosis occurring to repair the destroyed cells. So every time you have to replicate DNA you’re at risk an increased risk for mutation assuming it was the result of something like a cut.
sorry I have to go