The answer would be the dependent variable, because that would be your result.
Root hair absorbs water from the soil by osmosis.
The 2 major components or parts that compose or make up the plasma membrane of a eukaryotic cell would be the phospholipids arranged as a bilayer, having phospholipids arranged side by side in an upright and inverted manner, allowing for the hydrophobic and hydrophilic regions to interact respectively, and also Protein molecules, more specifically Transmembrane Proteins and Integral Proteins.
I believe it's because of the bacteria that decomposed algae which in the process consume oxygen
correct me if im wrong im not very bright at this subject but i try
here's a link to a website that could further help you
http://www.marinespecies.org/introduced/wiki/Possible_consequences_of_eutrophication
The lake becoming ice is due to the water (freezing)