Which statements about the apoplast and symplast pathways are correct?
1) In the apoplast pathway, water molecules move through free spaces in the cellulose cell walls of plant roots.
2) In the symplast pathway, water molecules diffuse through the cytoplasm and plasmodesmata of cells.
3) Water molecules travelling through plant tissue move by mass flow along the apoplast pathway.
4) The Casparian strip blocks the symplast pathway and forces all water molecules to enter the cytoplasm of endodermis cells.
1 )
1, 2, 3 and 4
1, 2 and 3 only
3 )
1 and 2 only
4 )
3 and 4 only
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