Our genes can be affected by the environment and change the way our traits are displayed, called the phenotype. However, changes in phenotype have an underlying genotypic source. Epigenetics or epigenetic changes are changes in the way traits are expressed as an effect of the environment (i.e. food we ate, chemicals in the body, environmental stresses), without changes in the DNA. Simply put, in epigenetics, some parts of the DNA are turned on or off in response to environmental conditions. 
        
             
        
        
        
Answer:
An arterie is a vessel that carries blood away from the heart, and a vein carries blood to the heart
Explanation:
Mark as barinly plzzz :))))
 
        
             
        
        
        
Answer:
Angiography
Explanation:
Doctors often use angiography that images the structure of blood vessels and the flow of blood through these vessels. 
- Angiography uses x-rays to take images of blood vessels and detect the flow of blood through these vessels.
- Useful in showing blocked or narrowed blood vessel for the diagnosis of any coronary disease.
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Hope this helped!
<h3>~AH1807 </h3>
 
        
             
        
        
        
It means they may or may not have the same function but have similar structure depicting that the organisms may have had a common ancestor.
        
             
        
        
        
Answer: they are in the same family. they are bovines.
Explanation: bulls and cows are in the same family, which makes them related.