Answer:
reciprocal exchange of dna 
 
        
             
        
        
        
Answer:
See below
Explanation:
There are several reasons that genetic variation occurs. Some of them are as follows: mutation, random fertilization, recombination event during meiosis etc. The way in which this variation in genetics is distributed is in a continuous way. In case of the human species, it is reported that 85% of all variation is within a certain population, while the remaining 15% of genetic variation is between populations.
 
        
             
        
        
        
Answer:
e.)  If exposure to cowpox gives immunity to smallpox in milkmaids, then milkmaids have a natural immunity and their blood should be used to develop a smallpox vaccine.
Explanation:
- Milkmaids who suffered from cowpox did not suffer from smallpox i.e. they were immune to the disease.
- If milkmaids did not suffer from smallpox then there must be some element of immunity that they received once they had recovered from cowpox, this would likely be found in their blood as antibodies.
 
        
             
        
        
        
Answer:
medium. (Science: cell biology) shorthand for culture medium or growth medium, the nutrient solution in which cells or organs are grown.
Explanation the top one is math mines biology 
 
        
             
        
        
        
Answer:
First option is the correct one.
Explanation:
Asexual reproduction produces offspring that are genetically identical to the parent because the offspring are all clones of the original parent. A single individual can produce offspring asexually and large numbers of offspring can be produced quickly.