Consider the structure of DNA and how it is passed on to new generations. Then consider the function of proteins like DNA polymerase. Now, based on the role proteins have in the process of DNA maintenance, replication, and/or new protein creation, discuss how proteins may be considered to play a vital role in the resulting inherited phenotype of an organism. Conclude with why DNA is still considered to be the primary source of heritable information.

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 set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils

The smallest parts of these that retain their original properties are called