The great burdock plant’s seeds have spines on them that attach to the fur of animals that brush against it. the seed then travels with the animal until it eventually falls off, which spreads the plant’s seeds farther than the plant could have done. what type of symbiotic relationship is this? . a.. mutualism. b.. commensalism. c.. parasitism. d.. competition

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.