Cody's family went hiking along a stream in Georgia and found a waterfall At the bottom of the waterfall, they noticed many small pebbles with smooth edges on the bottom of the stream.
If Cody's family added more rocks to the stream at the bottom of the waterfall, what should they expect to happen to the size of
the rocks over time?

Please help chores are in the picture!!

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.