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Transport systems in plants

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Complete this activity on transport systems in plants.

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Âge recommandé: 16 ans
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Transport systems in plantsVersion en ligne

Complete this activity on transport systems in plants.

par Belinda Schirmer
1

vessels Cohesion photosynthesis adhesion xylem pulls phloem root water transpiration tracheids evaporates upwards theory

Transport systems in plants carry and mineral ions in one direction only , from the roots to the leaves , in the . The products of are delivered wherever required around the plant in the tissue .
Xylem tissue is composed of xylem and xylem .
The - cohesion - tension currently explains the movement of substances up the xylem vessels .
Water from the leaves and creates tension , which more water up from the veins and then up the xylem vessel .
between water molecules and between the water molecules and the xylem walls maintain the column of water .
A small amount of pressure forces the water already present in the xylem vessels .

2

source photosynthesis Phloem high any sieve sink source plates tube low sink Companion translocation

tissue is composed of two types of living cells : tube cells and companion cells .
Sieve cells are lined up one under the other and have sieve at each end . The products of move through these tubes in a process called .
cells assist the sieve tube cells .
The movement of the products of photosynthesis in direction is explained by the - theory . Materials move in the phloem from a - pressure region where sugars are produced and loaded into the phloem ( ) to a - pressure region where they are required and unloaded ( ) .

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