The most effective way to prevent DNA mutation from UV radiation is: (C.) Avoid UV radiation by wearing sunscreen.
Mutation is the change in the normal sequence of DNA. The agents that induce these mutations are called mutagens. The mutations can be harmful as they can hamper the normal functioning of the living body. Some mutations however do not cause any significant changes and they are therefore called silent mutations. 
Sunscreen is a a cream or liquid applied to the skin that prevents the harmful radiations of the sun to enter the body. They protect from the sun's UV-A and UV-B radiations. 
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Answer:
I think B because white blood cells fight off bacteria and stuff. I hope this is right for you! if not I am sorry! Have a great holiday. 
 
        
             
        
        
        
The atomic number of an atom is the number of protons it has, and if the atom is neutral, it will also be the number of electrons. Therefore:
The atom you're talking about has 103 protons, and an atomic number of 103.
Hope it helped,
BioTeacher101
 
        
             
        
        
        
Answer:
Mitochondria 
Explanation:
In the eukaryotic cells, some cell organelles and membranes together make a membrane system called the endomembrane system. This system includes the endoplasmic reticulum, Golgi apparatus, lysosomes and nuclear membrane.  Members of this system works together. They modify, package, and transport lipids and proteins. The lysosomes formed from Golgi apparatus and contains hydrolytic enzymes. Mitochondria is the site for cellualr respiration and is not a part of the endomembrane system.  
 
        
             
        
        
        
In the development of a cancer cell, the formation of new blood vessels is called Angiogenesis, option B. When tumors are present in the body, circulation and the distribution of nutrients in the body is altered; thus, resulting in different kinds of disorders associated with cancer. With the presence of cancer, these tumors need more nutrients to spread and grow, which results in the formation of more blood vessels.