Barometers have long been used to predict the weather. Lucia and Kimberly are recording the class weather data each day in March. This morning, they tapped the barometer and noticed that the indicator needle did not move. What clue did the barometer give the boys about the day's weather?

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.