the sun produces a great amount of energy with sound and lights. We enjoy the sun's light and heat waves on earth, but cannot hear any sound of the sun. Explain the phenomenon in terms of mechanical waves

answer; ///i believe the answer your looking for is (ribosomes);

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.

it is called the mitotic spindle