A construction worker suffers a horrific injury on the job. He tripped on a piece of lumber and fell onto a steel rod. The rod entered into the anterior lower left quadrant of his abdomen and exited through the posterior upper right quadrant of his chest. Which vital organs did the rod likely puncture?

According to the rna world hypothesis, rna acted as the genetic material and catalyzed reactions in ancient cells. what conclusion can you draw from this?               a.  this implies that dna and proteins aren't essential in cells today.    b.  this implies that rna can catalyze any chemical reaction that enzymes catalyze.    c.  this implies that if a cell has a problem with its dna, its rna can compensate for the damaged dna.    d.  this implies that dna and proteins evolved after rna.