Please help me with this I need to bring my grade up.

( if you don't know don't answer )

( science )

( 20 points +brainliest )

( don't try to steal the points because I will report you )

( I do free point give outs, get points there )

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.

Plsss > .< compare and contrast the characteristics of flatworms rounds worms and earthworms

Genetic disorders can result when sister chromatids fail to seperate properly. during what phase is this problem most likely to occur?