Answer:
Oceanic crust is  younger crust . Well, It is because, an oceanic crust is formed when a continental crust undergoes a big tension crack due to the forces generated inside the earth, which may be because of the magma dwelling inside.  As the crack becomes prominent, the continent is broken into the segments with a big oceanic basin kind of structure between them (This takes millions and millions of years). Sediments deposit in the basin and get stratified to form the oceanic crust.  This is the reason that oceanic crust is younger than the continental crust.
 
        
                    
             
        
        
        
Answer:
An oceanographer study the ocean.
Explanation:
 
        
                    
             
        
        
        
Answer:
The sequence of the complementary strand of mRNA is AUCAUCAUC
Explanation: There are four bases in DNA: Adenine A, Thymine T, Guanine G, and Cytosine C while the bases found in RNA are Adenine A, Uracil U, Guanine G, and Cytosine C. In DNA base pairing, Adenine pairs with Thymine while in RNA base pairing, Adenine pairs with Uracil while Guanine pairs with Cytosine.