Answer:
ANSWER: Oxygen is a product of photosynthesis.
Explanation:
 Photosynthesis is a chemical reaction that occurs in plants.  Photosynthesis uses ATP energy from sunlight to convert Carbon Dioxide and Water into Glucose.  Oxygen is also formed during photosynthesis.  
 
        
             
        
        
        
they are caused by mutation. the best example of it are human blood groups.
 
        
             
        
        
        
Answer:
A dichotomous key is an important scientific tool, used to identify different organisms, based the organism’s observable traits. Dichotomous keys consist of a series of statements with two choices in each step that will lead users to the correct identification.
Explanation:
Your welcome! :)
 
        
             
        
        
        
The answer is "<span>B: all the gray squirrels that live in a forest" </span>