A class wants to use marbles in a clear shoebox with a lid to model the particles in a solid, a liquid, and a gas.

Describe how you would model the motion of the particles in each state.
Enter your answer in the space provided.

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.

when it is at an intermediate population density

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.