Answer: some moons are farther away and harder to spot
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I think c and d is the best answers
        
             
        
        
        
Okay, biology isn't exactly my strongest subject (it never has been), but I'm pretty sure the answer is nucleotides. DNA is made up of nucleotides. Each nucleotide contains a phosphate group, a sugar group, and a nitrogen base. There are four different nitrogen bases: adenine (A), thymine (T), guanine (G), and cytosine (C). A always pairs with T, and G always pairs with C.
        
             
        
        
        
Answer: 6 is the wavelength has decreased.
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Answer:
D)  Can simple organic molecules form spontaneously in an oxygen-free atmosphere?
Explanation: