Weathering deposition and cementation are all involved in the formation of a rock. what type of rock is it?
a foliated metamorphic
b chemical sedimentary
c organic sedimentary
d clastic sedimentary

What did the first language sound like

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.

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