(a) A student investigated mitosis in the root tip of a garlic plant - Edexcel - GCSE Biology - Question 2 - 2019 - Paper 1
Question 2
(a) A student investigated mitosis in the root tip of a garlic plant.
(i) Explain why the student used the tip of the root.
(ii) The student squashed the root tip ... show full transcript
Worked Solution & Example Answer:(a) A student investigated mitosis in the root tip of a garlic plant - Edexcel - GCSE Biology - Question 2 - 2019 - Paper 1
Step 1
Explain why the student used the tip of the root.
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Answer
The student used the tip of the root because it contains meristematic cells, which are actively dividing. This area is crucial for plant growth and provides a good sample for studying the process of mitosis.
Step 2
Describe how to use the microscope to obtain a clear image of the cells.
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Answer
To obtain a clear image of the cells using the microscope, first, switch the lamp on. Then, start with the lowest objective lens and look through the eyepiece lens. Finally, use the focusing knob to adjust until a clear image is obtained.
Step 3
State what can be added to the root tip squash to make the chromosomes visible.
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Answer
Staining solution can be added to the root tip squash to make the chromosomes visible.
Step 4
Which stage of mitosis is shown in Figure 2?
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Answer
The stage of mitosis shown in Figure 2 is Metaphase.
Step 5
Describe what is happening in Figure 2.
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Answer
In Figure 2, the chromosomes are lined up at the equatorial plane of the cell. They are attached to spindle fibers at their centromeres and are preparing for separation into daughter cells.
