Name the tissue in plant stems through which water rises to the leaves - Leaving Cert Biology - Question 15 - 2011
Question 15
Name the tissue in plant stems through which water rises to the leaves.
Give one way in which this tissue is adapted for the transport of water.
Give a precise loc... show full transcript
Worked Solution & Example Answer:Name the tissue in plant stems through which water rises to the leaves - Leaving Cert Biology - Question 15 - 2011
Step 1
Name the tissue in plant stems through which water rises to the leaves.
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Answer
The tissue in plant stems through which water rises to the leaves is called the xylem.
Step 2
Give one way in which this tissue is adapted for the transport of water.
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Answer
One way in which xylem is adapted for the transport of water is that it is narrow or lignified, providing a continuous lumen that facilitates efficient water movement.
Step 3
Give a precise location of this tissue in the stem.
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Answer
The xylem is located in vascular bundles or next to the phloem within the stem.
Step 4
State another function of the tissue referred to in (i).
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Answer
Another function of xylem is to provide support or other transport functions within the plant.
Step 5
The cohesion-tension model of transport attempts to explain water movement in plants against a particular force. Name this force.
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Answer
The force that the cohesion-tension model of transport explains water movement against is gravity.
Step 6
Describe the principal features of the cohesion-tension model.
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Answer
The principal features of the cohesion-tension model include the idea that water molecules stick together due to hydrogen bonding, forming a continuous column of water in the xylem. Additionally, the evaporation of water through transpiration creates a negative pressure, which 'pulls' the column of water upward, allowing for effective water transport against gravity.
Step 7
Name the two scientists mainly associated with the cohesion-tension model of transport.
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Answer
The two scientists mainly associated with the cohesion-tension model are Dixon and Joly.
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