Match each bond with the rearrangement of the valence electrons needed to form that bond.
ionic bond
sharing of electrons
sharing of many electrons
covalent bond
metallic bond
transferring of electrons

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 structure in the cardiovascular system connect arteries to veins?

What is the difference between a meteoroid and a meteor?