Schleiden and Schwann contributed to cell theory by establishing that all plants and animals are made of cells, respectively. This led to the conclusion that cells are the fundamental unit of all living organisms. Their joint findings are foundational to the study of biology. ;
Schleiden and Schwann significantly contributed to cell theory by concluding that all plants and animals are made of cells, establishing that cells are the basic unit of all living organisms. This led to a deeper understanding of biological processes. The correct option reflecting their contribution is that they claimed that cells were the basic unit of all living organisms.
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