Which of the following statements about autopolyploid individuals is true?
a. they result from matings between individuals of different species.
b. they can never produce viable offspring.
c. they contain more than two haploid sets of chromosomes.
d. they can always produce fertile offspring.

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.