Answer:
 C. H and O 
Explanation:
Almost 99% of the human body's mass is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium and phosphorus, in that order.
Element   Symbol   % in body
Oxygen       O              65.0
Coal             C               18.5
The human body is composed of 60% water, that is, H2O.
 
        
             
        
        
        
The sequence of bases on the other half of the DNA molecule would be CTAATGT from left to right, because each cytosine base pairs with a corresponding guanine base, and each adenine base pairs with a corresponding thymine base. 
        
             
        
        
        
The Miller-Urey experiment showed that simple molecules could have arisen abiotically. This chemical experiment included conditions similar to those present on the early Earth, and tested the origin of life under those conditions.
Water (H2O), methane (CH4), ammonia (NH3) and hydrogen (H2) were the chemicals used to produce the results of the experiment, the factors needed for simple life to arise. Given similar conditions on other planets, it's possible that life could arise there as well.
 
        
             
        
        
        
Answer:
Chromosome 11 likely contains 1,300 to 1,400 genes that provide instructions for making proteins
 
        
             
        
        
        
Answer:
The circulatory system transports blood throughout the body through the veins. The circulatory system works with the respiratory system because it transports oxygen through the body as well. It works with the digestive system because it transports waste so it can be disposed.
Explanation:
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