Answer:
1.) The two gametes found in humans are the sperm and the ova. 
2.) Variation, in biology, any difference between cells, individual organisms, or groups of organisms of any species caused either by genetic differences (genotypic variation) or by the effect of environmental factors on the expression of the genetic potentials (phenotypic variation).
3.) Because the alleles that the mother and the father carry are mixed together in the offspring. 
4.) Because it only introduces genetic variation into the population if a random mutation in the organism's DNA is passed on to the offspring.
Please this is all I can answer 
 
        
             
        
        
        
Answer:b
Explanation:
It will only be found in some cells because when a mutation is formed it will most likely not be able to spread
 
        
                    
             
        
        
        
Answer:
it shocks the hearts muscles jolting the heart into working again.
Explanation:
 
        
                    
             
        
        
        
"forest ferny floor" is an example of : alliteration
It's when the connected words were created using the same later sound at the beginning of the words/phrase
Hope this helps