Which of these would be a model of diffusion? A. a student passes through a revolving door

B. two students pass by each other in a hallway

C. two students bump into each other in a crowded subway car

D. many students pass from a crowded room into an empty hallway

Heredity has an impact on personal health, but environmental factors are important as well. select the best answer from the choices provided

Advances in technology have enabled scientists and researchers to better study the evolutionary relationships between species

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.