The xylem is a type of vascular tissue in plants that transports water and nutrients from the roots to the rest of the plant. The phloem is another type of vascular tissue in plants that transports sugars and other organic compounds produced during photosynthesis from the leaves to other parts of the plant.
Non-vascular plants are small because they lack vascular tissues like xylem and phloem, which are essential for transporting water and nutrients throughout the plant. Without this efficient transport system, non-vascular plants are limited in their ability to grow large and complex structures. Their small size allows for easier absorption of water and nutrients directly from the environment through diffusion.
yes, as a matter of fact they are, because a single cell can be as large as a tree (wrong) Trees are absolutely not single-celled organisms. they have phloem cells, xylom cells, probably more millions of cells than we can count.