our heart is a very important organ. it pumps the nutrients we need to all parts of the body. cardiovascular disease is often preventable. please research the causes and preventions of cardiovascular disease. which gender is more likely to get cardiovascular disease? male or female? why?

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.