Question

Which is the best explanation of water transport in a non-vascular?

Water moves only in the roots.

Water moves from cell to cell.

Water moves through a system of tubes.

Water moves directly to the flowers from the roots.

Answer 1

Explanation:

Water moves from cell to cell.

Vascular plants contain complex network of systems to facilitate the movement of substances. For instance the mature xylem vessel consists of dead cells called end-to-end aligned vessel elements where those ends were dissolved and the protoplasm was absent. These form long, continuous tubes that facilitate the free flow of water and minerals to other plant regions.

However, simple non vascular plants depend on diffusion and osmosis for transport:

• In diffusion small water molecules, both hydrophilic and containing large concentrations of polar water molecules or other water-soluble compounds, may pass across the phospholipid bilayer as a semi-permeable membrane into the extracellular fluid or cytoplasm.
• Likewise by osmosis, due to the difference in osmotic pressure on either side of the phospholipid bilayer, the water passes through the membrane, which means that the water moves from high osmotic pressure / concentration regions to low pressure / concentration regions to a stable state.

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