Suppose that 273g of one the substances listed above displaces 26ml of water. what is the substances?

How are carbon dioxide emissions affecting the earths natural cycle of temperature change? plz apex

Match the types of competition to their descriptions

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.