B.  the speed of the water
Explanation:
The independent variable here is the speed of the water being poured through the tube. 
An independent variable is the variable is the whose change does not rely on another. 
- The speed of the water is the cause of the sand deposition. 
- This is the independent variable. 
- The quantity of sand that is deposited is the dependent variable. 
- It relies on the speed of the water. 
- The dependent variable is the effect of the speed of water being poured. 
Lean more: 
Experiment brainly.com/question/5096428
#learnwithBrainly
 
        
             
        
        
        
Vidence of common descent<span> of </span>living organisms<span> has been discovered by scientists researching in a variety of disciplines over many decades, demonstrating the </span>common descent<span> of all </span>life on Earth<span> developing from a </span>last universal ancestor<span>. This evidence constructs the theoretical framework on which evolutionary theory rests, demonstrates that </span>evolution<span> does occur, and is able to show the natural processes that led to the emergence of Earth's </span>biodiversity<span>. Additionally, this evidence supports the </span>modern evolutionary synthesis<span>—the current </span>scientific theory<span> that explains how and why life changes over time. Evolutionary biologists document evidence of common descent by developing testable predictions, testing hypotheses, and constructing theories that illustrate and describe its causes. Hope you get it!</span>
        
             
        
        
        
Answer:
substitution, deletion, insertion (in that order)
Explanation:
I did the assignment-
 
        
             
        
        
        
Answer:
(1) It is known as a prosthetic group as heme consist of a protoporphyrin ring and a central iron atom. A prosthetic group is a specific non-polypeptide unit which is required for some protein's biological function. 
(2) Coenzyme.
(3) It is known as an example of a cofactor as it is not a permanent part of the enzyme.
(4) It is known as a prosthetic group as it is permanently attached to the enzyme.
(5) Coenzyme-A.
(6) Cofactor.
(7) Cofactor.