The photograph below shows the tissues in a transverse section of a dicotyledonous (dicot) stem - Leaving Cert Biology - Question a - 2009
Question a
The photograph below shows the tissues in a transverse section of a dicotyledonous (dicot) stem.
Give one feature shown in the photograph that allows you to identif... show full transcript
Worked Solution & Example Answer:The photograph below shows the tissues in a transverse section of a dicotyledonous (dicot) stem - Leaving Cert Biology - Question a - 2009
Step 1
Give one feature shown in the photograph that allows you to identify the section as a stem and not a root.
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Answer
The presence of vascular bundles arranged in a ring is a key feature that identifies the section as a stem rather than a root.
Step 2
Name the two vascular tissues, A and B, found in a vascular bundle.
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Answer
A = Xylem
B = Phloem
Step 3
Draw a labelled diagram to show a longitudinal section of tissue B.
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Answer
The diagram should show two tubes: one wide (the sieve tube) and one narrow (the companion cell). Label them accordingly.
Step 4
Give one function of each of the following:
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Answer
Dermal Tissue: Protects the plant and aids in absorption.
Ground Tissue: Stores nutrients and provides support, allowing for diffusion.
Step 5
In which of the vascular tissues does water transport occur?
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Answer
Water transport occurs in the Xylem.
Step 6
State one way in which this tissue is adapted for water transport.
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Answer
The xylem vessels are narrow and continuous, which facilitates the upward movement of water.
Step 7
In which direction does this transport take place?
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Answer
This transport takes place upwards.
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