Easy question . will give brainliast

In some plants, pointed leaves (p) are dominant over rounded leaves (p). a plant with a genotype of pp

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.

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?