C. Scientific observations show that microscopic organisms living in the deep ocean are not made up of cells
Explanation: The cellular theory says that cells are the structural and functional basic unit of life, that all living organisms are made up of cells and that cells came from other cells. This theory should be modified if there's scientific observations that challenge the postulates: living organisms that were not made up of cells can't have cells as functional and structural units, for example.
C. Scientific observations show that microscopic organisms living in the deep ocean are not made up of cells
Explanation: The cellular theory says that cells are the structural and functional basic unit of life, that all living organisms are made up of cells and that cells came from other cells. This theory should be modified if there's scientific observations that challenge the postulates: living organisms that were not made up of cells can't have cells as functional and structural units, for example.
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