Which of the following is a correct statement about the currently accepted "rna world hypothesis" which possibly to explain the evolution sequence of dna, rna, and proteins?
a) rna arose from dna
b) dna arose from rna
c) proteins were the first catalysts
d) dna was the first catalyst
e) the current protein translation system under which genomic dna is transcribed into rna and rna is then translated into proteins which function as catalysts in enzymatic reactions has always existed. no previous variable transcription/translation system existed.

Read the scenario below and answer the question that follows. hallie is reading a novel in the library when susan, her best friend, slumps down in a chair next to her. susan doesn't say anything, but hallie knows that susan is upset because she is slumping in her seat and rolling her eyes. a psychologist would explain that hallie is interpreting her friend's emotion based on a. the behavioral component of emotion b. her friend's ability to regulate emotion c. the verbal component of emotion d. the physiological component of emotion select the best answer from the choices provided a b c d