d bc (a b c  and d) r the same to make a tidepool
        
             
        
        
        
Answer:
For example, addition of an orange chromic acid reagent to some compounds causes the chromium reagent to change to a blue-green color (Figure 6.37a). This is considered a "positive" test result, and in this case indicates the presence of a functional group that can be oxidized (alcohol or aldehyde).
 
        
             
        
        
        
The answer is the plant growth, because the dependent variable is what responds to the independent variable. 
        
             
        
        
        
 The answer is Euglena. Euglena is a genus of single-celled flagellate eukaryotes. It is a large genus of unicellular protists, which have both plant and animal characteristics. All are motile by means of a flagellum. Most have chloroplasts (alga and plant characteristic). Euglenids are believed to descend from an ancestor that took up green algae by secondary endosymbiosis.
        
                    
             
        
        
        
A verified animal source such as animal planet or any website that doesn't have ads and has accurate info