Answer:
Furthermore, animal cognition research tends to eschew questions of which animals are smarter than others, focusing instead on more specific questions like the ones above. Scientists often say that they are more interested in how well an animal evolved to thrive in their environment, rather than in how smart they are.
 
        
             
        
        
        
Cytosine
(C) - both;
Thymine (T) – DNA;
Uracil (U) - RNA.
Adenine 
(A) - Both 
Guanine 
(G) - Both
These are the letters that we use to represent the nitrogenous base pairs that make up and thus define a nucleotide
 
        
             
        
        
        
Answer:
Most of the heavy metals on earth came from outer space from supernovas 
This occurs when stars die 
Explanation:
Visit Ted-Ed on You Tube 
Type in the origins of gold and take notes 
Happy to help