Answer: The plants may produce needed carbon dioxide.
Explanation:
This is the only benefit as medicine needs to be found, they won't be cut down, and they do take in toxins but it does not affect the study 
 
        
             
        
        
        
5. It is difficult to diagnose genetic conditions because they are rarely seen and once problems start presenting themselves not only would a diagnosis need to be made. But to prove it you would have to take blood from both parents to see why they together could produce genetic conditions. 
6) Down syndrome occurs when you get a smaller number of chromosomes you are supposed to inherit from each parent during conception. 
7) a silent mutation is a change in DNA but does not changes the encoded and has no phenotypic effect therefore the genetic sequence is not changed
        
             
        
        
        
Answer:
red will be the bottom layer
Explanation:
in order to find its density you have to do mass/volume. 
Blue: 12/3 = 3  
Clear: 10/5= 2
Red: 15/3= 5
Yellow: 18/9 = 2
The one with the greates valua aka greatest density will be at the bottom layer/