Draw a diagram of a transverse section through a young dicotyledonous stem as seen under the low power lens of a microscope - Leaving Cert Biology - Question 14 - 2014
Question 14
Draw a diagram of a transverse section through a young dicotyledonous stem as seen under the low power lens of a microscope. Indicate on your diagram a location for ... show full transcript
Worked Solution & Example Answer:Draw a diagram of a transverse section through a young dicotyledonous stem as seen under the low power lens of a microscope - Leaving Cert Biology - Question 14 - 2014
Step 1
Draw a diagram of a transverse section through a young dicotyledonous stem
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Answer
Create a detailed diagram showing the transverse section of a young dicotyledonous stem. Indicate the locations for dermal tissue, ground tissue, and vascular tissue as follows:
Dermal tissue: Located on the outermost layer (epidermis).
Ground tissue: Found in the central region of the stem, mainly for support and storage.
Vascular tissue: Located closer to the center, comprising xylem and phloem.
Step 2
Which of the above tissue types has a different location in a young root?
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Answer
The vascular tissue has a different location in a young root compared to its position in the stem.
Step 3
Where precisely is the tissue type referred to in 1. found in the root?
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Answer
The vascular tissue in the young root is found in the center, surrounded by ground tissue.
Step 4
Give one function of ground tissue.
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Answer
One function of ground tissue is support or storage, and in some cases, photosynthesis.
Step 5
Draw labelled diagrams to show the detailed structure of the two vascular tissues of plants.
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Answer
Draw two labelled diagrams:
Diagram 1 (Phloem): Include elements like the sieve tube, companion cell, and sieve plate.
Diagram 2 (Xylem): Show elements like xylem tubes, pits, tracheids, and vessels. Ensure to label relevant parts from both diagrams.
Step 6
Which of the tissues referred to in (iii) is composed of living cells?
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Answer
The phloem tissue is composed of living cells.
Step 7
What is the function of meristematic tissue?
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Answer
The function of meristematic tissue is mitosis or cell division, leading to growth or the production of new cells.
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