Which codon is the code for the amino acid histidine (His) ?

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.

In the ocean why are the greatest amount of primary producers found in the epipelagic zone and how does that affect biodiversity

What is the name of the idea that energy cannot be created nor destroyed