What is cell division ? Why do cell needs to to divide ?

Here's one way to follow the scientific method. place the missing steps in the correct position in the process.

How does the study of genetic disorders such as pku biologists understand normal alleles?

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.