What are 10 chemicals or other items that are poured down the bathroom/kitchen drain or emptied into water sources
such as lakes, streams, rivers, and groundwater?

the answer is b.) hydrogen bonds between bases.

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.

i don't understand

explanation:

i don't understand your question