All Tubes incubated for 20 seconds and are filled with 4mL of H202 and TUBE 1: 1mL of catalase TUBE 2: 2mL of catalase TUBE 3: 3mL of H20 (water) TUBE 4: 4mL of sucrase Which tube serves as the control?​

answer: that would be cheating

explanation:

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.

your spelling is a little off : ]

bacteria could be both, harmful and to us. harmful bacteria could make us sick and probably even by getting the chances of getting a disease, but good bacteria fight it off with your immune system. there is always bacteria everywhere we go. we need to make sure to wash our hands after using the restroom, before eating, after eating, after petting an animal too. so you see, bacteria is everywhere and is harmful or . i hope this . : ) : ) : )