Eva is performing an experiment to determine which type of disinfectant kills the most bacteria. she has six plates of the same kind and amount of bacteria. she adds one of five different kinds of disinfectant to each plate and leaves one plate without any disinfectant as a control. what role does the independent variable play in this experiment?

The  answer is the type of disinfectant determines the amount of bacteria killed.

Hope this helps. 

i think its b

explanation:

prophase: we can observe the chromosomes to coil up and condense. they become visible. nuclear membrane and envelope disintigrate.s

metaphase: chromosomes align at the center, the metaphase plate. spindle fibers attach to centromeres of the sister chromatids. they meet at kinetochores.

anaphase: sister chromatids are pulled towards each opposing centromere, set on different poles.

telophase: chromosomes are now clustered up only on either sides of the cell. nuclear membranes reform, and a new cell wall forms along the cell plate. this will lead to cytokinesis, the process that divides the cell membrane and forms the cell wall.