there are 61 mrna codons that specify an amino acid, but only 45 trnas. this is best explained by the fact that:

i believe the answer is: returns on investments, no wages

people who belong in upper class society would most likely get there by obtaining multiple source of income, which a certain percentage of ownership for businesses. since most of them are job creator, they would most likely get their money from profit, not wages.

answer; observing;

answer; humanistic;