Biology - How cell theory relates to survival
How cell theory relates to survival
Computer-enhanced image of cells lining the gut.
View the video, cells are clearly visible in this cross section of a plant
stem seen through the microscope
View the video of frog embryo cells dividing (speeded up by time-lapse
Schleiden and Schwann put forward the cell theory in 1839:
* All living things consist of one or more basic functional units -
called "cells" - and their products.
* New cells are produced from existing cells.
The survival of organisms depends on the survival of the cells of which
they are largely composed. Despite changes that occur in the external
environment, the internal conditions of cells must be stable enough for
cell processes to occur.
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