Answer:
I think it is D. A forest fire
 
        
             
        
        
        
Answer:
1.  The grasses that are diseased. 
Explanation:
1. In the event that the grasses were diseased, the environment will recoup itself from this sort of disturbance.
 
        
             
        
        
        
Answer:
B
D
C
A
Explanation:
Digestion begins in the mouth with the process of chewing also known as mastication. Saliva in the mouth mixes with the food. saliva contains amylose. This breaks down sugar into smaller units of dextrins and maltose.
In the small intestine, the pancreas releases pancreatic juice which breaks down dextrins into smaller units.
the cells in the small intestine helps to transport the digested nutrients to the blood stream 
Undigested food goes to the large intestine and eliminated in the stool
 
        
             
        
        
        
The overall three-dimensional structure of a polypeptide is called its tertiary structure. The tertiary structure is primarily due to interactions between the R groups of the amino acids that make up the protein.