Answer:
is it true or false that new cells arise from pre-existing cells.False
Explanation:
False
 
        
                    
             
        
        
        
The coronary arteries supply blood to cardiac tissue. The left ventricle chamber of the heart requires the greatest amount of blood supply to keep it working.
Coronary arteries
The heart muscle receives blood from the coronary arteries. The heart muscle needs oxygen-rich blood in order to operate, just like all other bodily components do. Blood that lacks oxygen must also be transported away. Outside of the heart, the coronary arteries encircle the organ.
The coronary artery that is blocked the most frequently is the LAD artery. The interventricular septum, and therefore bundle branches of the conducting system, receive their primary blood supply from it.
To learn more about coronary arteries refer here:
brainly.com/question/19642815
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Yes, they are rare events 
true
        
             
        
        
        
Plants tend to grow where the light is coming from because the sun is there main energy source. this helps with plants growing in nature because in nature they will have all the sun that they need and will be able to grow faster 
        
             
        
        
        
Answer:
Explanation:
Biconvex lens: Distinguised by two spherical (convex) surfaces. ...
Aspheric Lens: Aspheric curves allow higher magnification with less distortion. ...
Aplanatic Lens: Consists of two equally strong plano-convex lenses. ...
Achromatic Lens: Top quality lens.