Which of these can be examined using science? (2 points) a) whether horses love humans more than elephants

b) whether horses are happier animals than elephants

d) whether elephants live longer in captivity than in the wild

c) whether elephants are easier to care for than horses

How can scientists test their ideas about the origin of the universe if they can't physically interact with or study?

What could happen if two base pairs on a strand of dna or switched

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.