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How is the transport of substances done across the bryophyte tissues? How is this feature related to the general size of these plants?
In bryophytes there are no water-conducting or nutrient-conducting structures and the transport of these substances is done by cell to cell diffusion. The small size of bryophytes relates to this feature since if there are no conductive vessels it is not viable to have cells too far from each other (the emergence of the conductive tissues in tracheophytes allowed their enhance in size).
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