In what direction are substances moving during the process of secretion? explain what these substances are and why they are excreted from the body.

How are the tortoises that darwin observed on the galápagos islands similar to the anoles that losos studied

How many major plates cover the earth

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.