5. The quality of 3 brands of paper towels (A, B and C) was tested and compared to the quality of Publix paper towels. The quality of the towels was determined by measuring the amount of water absorbed by one cm2 of towel. The experiment was repeated 10 times. At the beginning of the experiment, the scientist thought that brand C would be the best brand. what is the control?

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

Ialready know the answers to these questions and they are on the attachment. but i just need to know why that answer is the correct one. plz asap! this is for a report that i need to email by 10!

What would happen if the tubing with the yellow band was placed in a beaker of distilled water?