The diagram shows a plant with variegated leaves i.e - Junior Cycle Science - Question 3 - 2010
Question 3
The diagram shows a plant with variegated leaves i.e. the leaves have areas with different colours. The leaves of this plant have a green centre with pale yellow mar... show full transcript
Worked Solution & Example Answer:The diagram shows a plant with variegated leaves i.e - Junior Cycle Science - Question 3 - 2010
Step 1
Why was the plant left in darkness for a day at the start of the experiment?
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Answer
The plant was left in darkness to destarch the leaves. This allows us to ensure that any starch produced later during the experiment can be accurately measured.
Step 2
Why was the leaf boiled in water?
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Answer
The leaf was boiled in water to kill and soften it, making it easier to test for the presence of starch.
Step 3
Draw a labelled diagram, in the box, showing the apparatus and named liquid used to remove the green pigment from the leaf.
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The diagram should show a test tube containing alcohol, with a leaf submerged inside. The alcohol must be labelled as 'Alcohol' and the heated water as 'Hot water.' Ensure the heat source is indicated to show the alcohol is being heated.
Step 4
Name the solution used.
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Answer
The solution used is iodine.
Step 5
Suggest a reason why the leaf margins did not turn blue-black.
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Answer
The leaf margins did not turn blue-black because they do not contain chlorophyll and thus could not photosynthesize, resulting in no starch being produced in those areas.
Step 6
Name part A of the carpel and give its role in the sexual reproduction of plants.
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Part A of the carpel is the ovary. Its role is to contain ovules which develop into seeds after fertilization.
Step 7
Name part B of the stamen and give its role in the sexual reproduction of plants.
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Part B of the stamen is the anther. Its role is to produce pollen, which contains male gametes (sperm).
Step 8
Give a way in which the pollen from the flower of one plant can be transferred to the flower of another plant.
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Pollen can be transferred by insects, such as bees, during the process of pollination, or by wind.
Step 9
Name the cell that is formed when a male gamete (sperm) and a female gamete (egg) combine.
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The cell formed is called the zygote.
Step 10
What does the cell formed by the fusion of the male and female gametes of a flowering plant grow and develop into?
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The zygote grows and develops into an embryo, which is part of the seed, eventually forming a fruit.
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