The diagram shows part of a transverse section through a dicotyledonous stem - Leaving Cert Biology - Question c - 2006
Question c
The diagram shows part of a transverse section through a dicotyledonous stem.
(i) Copy the diagram into your answer book and identify each of the following by placi... show full transcript
Worked Solution & Example Answer:The diagram shows part of a transverse section through a dicotyledonous stem - Leaving Cert Biology - Question c - 2006
Step 1
Copy the diagram into your answer book and identify each of the following by placing the appropriate letter on your diagram: phloem P, ground tissue G, xylem X, dermal tissue D.
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Answer
In the diagram, label the following:
P for phloem
G for ground tissue
X for xylem
D for dermal tissue.
Step 2
In which of the tissues that you have identified are sugars mainly transported?
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Answer
Sugars are mainly transported in the phloem (P).
Step 3
State a function of D.
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Answer
The function of D (dermal tissue) is to provide protection, such as preventing water loss and protecting against infection or to maintain turgor pressure.
Step 4
What did you use to cut the section?
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Answer
I used a blade or scalpel to cut the section.
Step 5
How did you support the stem while you were cutting the section?
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Answer
I supported the stem using a pith holder or by holding it with my hand.
Step 6
How did you transfer the section to a microscope slide?
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I used a mounted needle or a section lifter or forceps or a paintbrush to transfer the section to a microscope slide.
Step 7
State one way in which a transverse section through a monocotyledonous stem differs from the one that you cut.
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Answer
In a transverse section through a monocotyledonous stem, the vascular bundles are scattered, unlike in a dicotyledonous stem where they are arranged in a ring.
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