Match the type of lava with its description: ___19. Volcanic Ash a. pebble-sized particles

___ 20. CInders b. Particles ranging from the size of a baseball to
The size of a car

___ 21. Bombs c. Fine rocky particles as small as a grain of sand

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.

in a chemical reaction, the atoms and molecules produced by the reaction are called products. no new atoms are created, and no atoms are destroyed. in a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.