Water Transport:
Water absorbed by the root hairs is translocated upwards via the xylem. The mystery of the upward movement of water is still to be resolved in a satisfactory manner. The upward transport of water in plants that are 400 feet high still holds a serious trouble as it has not been satisfactorily described till date.
However the mechanism for upward movement of water or ascent of sap is not apparent, it has been confirmed that ascent of sap occurs via xylem.
The girdling experiment was completed in a plant with thick stem where the outer layer of phloem was eliminated. Still it was found that ascent of sap sustained to occur proving that ascent of sap occurs via the xylem.
A young tomato or balsam seedling was taken and kept in a beaker having water colored with eosin. After sometime it was seen that streaks of red color were running up the stem. Whenever a cross section of the stem was taken, it was found that xylem was colored proving that ascent of sap occurs via the xylem tissue.
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the alignment is simply checked through laying the edge of a steel foot rule against the sides of the two flanges and testing whether the steel edge sits completely against the sides of the two flanges or if there is any gap.
The embryo builds up into an adult plant along with roots, stem and leaves because of the activity of the apical meristem.
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