Light___.
requires a medium to travel
is refracted when it bounces off a shiny surface
is created by vibrations in electric and magnetic fields
moves in longitudinal waves

How is ribosomal rna useful as a molecular clock? a. a large portion of the dna ring is not vital to structure or function, allowing it to accumulate neutral mutations. b. its rate of mutation increases over time as organisms continue to evolve and differentiate from each other. c. a slow mutation rate makes it useful for determining evolutionary relationships between ancient species. d. it is only found in select organisms, making it easier to compare relationships between species that have it.

18. which statement about cancer is true?

What molecule contains an organisms genetic material, passed down from parents to their offspring