Which type of volcano is formed from alternating layers of lava and ash?
a. composite volcano
b. shield volcano
c. hot spot volcano
d. fissure

Why should the united state be concerned about air pollution in china?

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.

What is the process of pulling apart an n2 molecule nevermind i got it