Which best describes the behavior of atoms in a solid substance that is melting into a liquid? a)atoms that once slid past one another now only vibrate in place. b) atoms that once slid past one another now expand in all directions. c.) atoms that were once in fixed positions now slide past one another. d. atoms that were once in fixed positions now spread freely in all directions.

In which case would a scientist choose to use a dissecting microscope rather than a compound microscope

Describe how alleles and genes are related

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.