Answer:
An identical setup but replacing the enzyme with an equal volume of water
Explanation:
When carrying out any experiment, it is important to set out a control in order to increase the reliability of the data and results.
The control minimizes the effects of variables other than the independent variable.
In the above experiment, starch has to be eliminated and replaced with water. Water does not have starch hence the digestive enzyme being tested will not have any effects making the data and results from the experimental group reliable. 
 
        
             
        
        
        
Crater lake was produced when a stratovolcano collapsed, creating the crater.
        
                    
             
        
        
        
Student 4 is correct. The farther the planet is from the Sun, the less pull it exerts on it.
        
             
        
        
        
Answer:
Structure of large intestine: Large intestine is the part of digestive system which comes in the end. It consist of four parts. Large intestine length is 150 cm and width is 5 cm. 
Function of large intestine: It performs two main functions. 
1) Large intestine helps in the absorption of water and nutrients from the food which cannot be digested in the stomach. 
2) It removes the waste material from the body in the form of feces.