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7. (a) (i) Why is a dicotyledonous (dicot) plant so called? (ii) Name a dicotyledonous plant - Leaving Cert Biology - Question 7 - 2009
Question 7
7. (a) (i) Why is a dicotyledonous (dicot) plant so called? (ii) Name a dicotyledonous plant. (b) (i) Describe in detail how you prepared a microscope slide... show full transcript
Worked Solution & Example Answer:7. (a) (i) Why is a dicotyledonous (dicot) plant so called? (ii) Name a dicotyledonous plant - Leaving Cert Biology - Question 7 - 2009
Step 1
Why is a dicotyledonous (dicot) plant so called?
Answer
A dicotyledonous plant is so called because it has two embryonic leaves, known as cotyledons, that emerge during the early stages of development. These cotyledons play a crucial role in providing nutrients to the plant until it can develop true leaves.
Step 2
Step 3
Describe in detail how you prepared a microscope slide of a transverse section of the stem of a dicotyledonous plant.
Answer
To prepare a microscope slide of a transverse section of the stem of a dicotyledonous plant, I began by cutting a thin slice of the stem using a sharp blade or scalpel. I made sure to cut the section away from myself for safety. The thin section was then carefully transferred to a clean microscope slide. To ensure transparency, I added a few drops of water on top of the cut section before placing a cover slip over it, which flattened the specimen and minimized air bubbles.
Step 4
Give an account of the procedures that you followed in order to view your slide under the microscope.
Answer
I placed the prepared slide onto the microscope stage and ensured that it was secured. I then turned on the light or adjusted the mirror to provide adequate illumination of the slide. I started by using the low power lens to locate the specimen, making sure to adjust the focus as needed to get a clear image of the section.
Step 5
In the space below draw enough of your section to show and label the location of each of the following: 1. Phloem. 2. Xylem. 3. Ground tissue.
Answer
In this section, I would draw a diagram of the transverse section of the stem, clearly indicating and labeling the locations of phloem, xylem, and ground tissue. The xylem typically appears towards the inside of the stem, with the phloem positioned just outside of it, and the ground tissue surrounding these vascular tissues.