Answer:
b. 80
Explanation:
There are about 4 calories per gram of carbohydrates. As such, if 20 grams of carbohydrate are provided, simply multiply 4 calories per gram with the total amount of grams of carbohydrates.
<em>20 grams of carbohydrates</em> x <em>4 calories per gram of carbohydrates</em> = 80 calories total. 
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Answer:
Organic compounds→ nucleotides→ RNA→ universal code.
Organic compounds are the compounds made by living organisms with at least one molecule of carbon linked to different elements like hydrogen, oxygen, or nitrogen.for example: nucleotides.
A nucleotide is the monomer units of nucleic acids- DNA and RNA. Each nucleotide is made up of organic compounds- sugar, a phosphate molecule and nitrogenous bases (adenine, guanine, cytosine, thymine and uracil).  
The arrangement of nitrogenous bases in DNA decides the fate of proteins as the sequence of these bases acts as code arranged in the triplet called "codons" which code for specific amino acids.
Thus, Organic compounds→ nucleotides→ RNA→ universal code is the correct answer.
 
        
             
        
        
        
Answer:
Carbon Cycle: the series of processes by which carbon compounds are interconverted in the environment, involving the incorporation of carbon dioxide into living tissue by photosynthesis and its return to the atmosphere through respiration, the decay of dead organisms, and the burning of fossil fuels.
Explanation:
 
        
                    
             
        
        
        
Plates collide causing rock to push upward together