How do cells in humans get the nutrients they need?

The mitochondrion functions lipid storage protein synthesis photosynthesis dna replication atp synthesis

What are the four basic classes of organic molecules how do they differ structurally and functionally

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.