Within a strand of RNA, nucleotides can contain one of four different nitrogenous bases. What is the impact of this variation in nitrogenous bases? The bases arrange themselves into codons consisting of two bases, with each codon producing a unique amino acid.
The different bases code for different amino acids, which build proteins with a wide variety of functions.
The nitrogenous bases all form the same types of bonds and, therefore, differ in structure but not chemical properties.
The variations in base sequence require a greater number of proteins to carry out RNA translation.

No, proteins don't carry out translation, ribosomes do.  

And even if one considered the fact that ribosomes contain proteins (even though it is the ribosomal RNA part that links amino acids together in translation), it still would not be true that the variations in base sequence required more ribosomal proteins.

Explanation:

hope this helps

its the only way i could explain it sorry

not necessarily. higher fitness requires the organism to be reproductive successful. for example, an organism at age 10 with 15 offspring is much more fit than an organism at age 15 with only 5 offspring.