The answer would be the first one
        
             
        
        
        
In what organisms are you referring to?
        
                    
             
        
        
        
There is a place in the lid where the fluid rushes to when you tip it, leaving the air bubbles in the cylinder of the bottle. In some companies it's a chemical inside the fluid that can evaporate over time and looses it's " magic" effect.
 
        
             
        
        
        
Answer:
to show the function of one organ in the digestive tract in isolation
 
        
             
        
        
        
Answer:
The steps involves making hypothesis, deriving predictions from the logical consequences and then carrying out experiments based on those predictions.
Explanation:
Step 1: make a observation .
Step 2: Formulate a statement or question.
Step 3: Form  the hypothesis .
Step 4: make a prediction based on the hypothesis. 
Step 5: test the hypothesis whether its true or not.
Step 6: use the results to conclude the experiment.