The main theme of the poem is the regret and sorrow the narrator feels about the end of his relationship with the woman in the poem, described only as "you." The poem suggests that the woman may well have been the one to break off the affair: Pale grew thy cheek and col
This is called asexual reproduction.
One statement that could disprove this theory is the fact that, according to the cell theory, all cells come from pre-existing cells. This basically means that cells can't just appear from nowhere; they have to come from another cell. Based on what we know today from scientific research, is there another law or statement that you could come up with to help disprove the theory? Hope this helped! :)
SI units are a modern form of the metric system.