Answer:
<h2>a) Evolution</h2><h2>
b) harmful recessive traits become uncommon</h2>
Explanation:
<h2>
Experiments on mice should be stopped. I had a pet as a white mouse. He died because of depression 2 months ago. I am sad about seeing this mouse being treated cruelly in the lab.</h2>
 
        
             
        
        
        
Answer:
increased stability in the ecoystem
 
        
             
        
        
        
Answer:
Control group
Explanation:
In an experiment, the group which receives the treatment (in this case injection of actual drug)  is known as experimental group because the experiment is being conducted on it. While on the other hand the group which do not receive the treatment is known as control group. The results obtained from the experimental group are compared with the control group to determine the effectiveness of the treatment. 
 
        
             
        
        
        
Answer: Cows put in a pasture of fresh grass will eat it down too a point it would regrow fast.. Unless the pasture is not large enough for the number of cattle. Then they will eat it into the ground and kill it.
Explanation:
 
        
             
        
        
        
Answer:
Element is a substance that cannot be broken down into simpler substances. Atoms are the smallest particle of an element. An element has a fixed composition because it contains only one type of atom.