fossils have a species of bird are found in layer 3. Which layer is most likely to have organisms that lived at the same time as the bird species ?

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.

Which of these correctly describes the difference between processes that take place in prokaryotic and eukaryotic cells?

The function of the ciliary escalator is to