1. use model 1 to show which atoms are present in each type of molecule by listing the symbol for each atom included. carbohydrate has been done for you. a. carbohydrate— c, h, o c. amino acid—b. lipid— d. nucleic acid—

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.

Drag each tile to the correct box. arrange the layers and faults from oldest to youngest.

Several billion years ago which gas was the least prevailant in the atmosphere