take a cross section of onion bulb and locate different layers
Answers
Explanation:
The bulb of an onion is formed from modified leaves. While photosynthesis takes place in the leaves of an onion containing chloroplast, the little glucose that is produced from this process is converted in to starch (starch granules) and stored in the bulb.
Chlorophyll and chloroplasts responsible for photosynthesis are therefore only present in the leafy part of the onion (above ground) and absent in the bulb (which grows below ground).
Unlike animal cells (such as cheek cells) the cell wall of an onion and other plants are made up of cellulose, which protects the cell and maintains its shape.
How to Obtain a Thin Layer of Onion Cells
An onion is made up of layers that are separated by a thin membrane. For this experiment, the thin membrane will be used to observe the onion cells. It can easily be obtained by peeling it from any layer of the onion using tweezers.
How to Prepare a Wet Mount Slide
A thin onion membrane,
Microscopic glass slides,
Microscopic cover slips,
A needle,
Blotting paper,
Dropper,
Iodine Solution,
Water,
Microscope
**Note- In microscopy, wet mount refers to a glass slide holding a specimen suspended on a drop of liquid for examination.
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