12. The bending and growth of a plant's stems and roots is primarily directed by the actions of
which of the following?
A salts and minerals
Cauxin hormones
B turgor pressure
D chlorophyll molecules

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.