Awoman gives birth to a son who has type o blood. she has type b blood. which of the following can be concluded from this about her parents' blood types? a.) one of her parents had at least one o allele. b.) one of her parents had two b alleles. c.) one of her parents had type b blood and the other type o blood. d.) one of her parents had type o blood.

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.