The correct answer is: A. A change in a cell's genetic material.
Mutations occur in DNA as a result of mistakes during the DNA replication (when repair mechanisms don’t fix it) or as the result of environmental factors (e.g. UV light). Mutations can have positive impact, by increasing the genetic variation or can have negative effect, causing the diseases or cancer.
 
        
             
        
        
        
Explanation:
<h2>Answer:-</h2>
In case of Figure A and B,
- The work is being done perpendicular against the gravity. And we know that when work is done perpendicular to gravity, then zero work is done.
For Example:-
We also need to know that work done in circular motion is zero.
So, work done by electron to orbit around a proton is also zero.
:)
 
        
             
        
        
        
Answer:
Raectant-
NAD+, FAD, GDP, Pi, H2O, and Acetyl CoA
Product- 
NADH, H+, FADH2, GTP, and CO2
Explanation:
 
        
             
        
        
        
Answer: O Diffusion moves particles across the cell membrane from areas of high concentration to
areas of low concentration
Explanation:
 
        
             
        
        
        
Catalyst speeds up the reaction rate of a chemical reaction