What does the cell theory teach?
There are a number of things that the cell theory teaches. The most important is that the cell is the basic unit of all living organisms.
It does not. Cell theory is fully compatible with evolutionary theory. Does this mean we know everything about the evolution of cells? No. We say we do not know, not that cell theory shows that evolutionary theory is incorrect. ( except, of course, if you are referring to heritability. This Darwin got wrong, but this is not directly related to cell theory )
The cell theory isn't a cell theory for atleast 2 reasons. The first reason that the cell theory is a theory is that viruses are a big exception to it. Viruses are not made of cells, and they don't have a metabolism and the activity of an organism depends on chemical reactions, but some scientists still consider them to be alive, so that goes against what the cell theory says. The second reason is simple...the…
Credit for developing cell theory is usually given to three scientists: Theodor Schwann, Matthias Jakob Schleiden, and Rudolf Virchow. In 1839, Schwann and Schleiden suggested that cells were the basic unit of life. Their theory accepted the first two tenets of modern cell theory. However, the cell theory of Schleiden differed from modern cell theory in that it proposed a method of spontaneous crystallization that he called "free cell formation".