The diagram shows a strawberry plant from which a runner has given rise to a daughter plant - Leaving Cert Biology - Question 4 - 2013
Question 4
The diagram shows a strawberry plant from which a runner has given rise to a daughter plant.
(a) The runner is a modified stem. How could you tell this from
1. e... show full transcript
Worked Solution & Example Answer:The diagram shows a strawberry plant from which a runner has given rise to a daughter plant - Leaving Cert Biology - Question 4 - 2013
Step 1
1. external observation
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Answer
You can observe the presence of buds or nodes on the runner, which indicates it is a modified stem. Additionally, the characteristics of the runner such as its structure, which may resemble a stem, provide visual clues.
Step 2
2. viewing a thin section of it under the microscope
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Answer
Under a microscope, the vascular bundles observed in the thin section of the runner would be indicative of a stem structure, as they are arranged differently compared to those in leaves.
Step 3
What term is used for the type of asexual reproduction that produced the daughter plant?
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The term used for the type of asexual reproduction that produced the daughter plant is 'vegetative propagation.'
Step 4
Would you expect the daughter plant to be haploid or diploid? Explain your answer.
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The daughter plant is expected to be diploid because it is produced by mitosis from the parent plant, resulting in genetically identical cells that carry the same number of chromosomes as the parent.
Step 5
What evidence is there in the diagram that sexual reproduction has also taken place?
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The presence of fruit or berries in the diagram indicates that sexual reproduction has taken place, as these are typically formed from fertilized ovules.
Step 6
Give one method, other than runners, and not involving seeds, that is used by horticulturists to produce new plants.
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One method used by horticulturists is 'cuttings or layering,' which involves taking a section of a plant and allowing it to root to produce a new plant.
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