Question

The diagram given below represents an experimental set-up to demonstrate a certain process. Study the same and answer the questions that follow:

 

1. Name the process.
2. Define the above-named process.
3. What would you observe in the experimental set-up after an hour or so?
4. What control experiment can be set up for comparison?
5. Keeping in mind the root hair, cell and its surroundings, name the parts that correspond to
   1. concentrated sugar solution
   2. parchment paper
   3. water in the beaker
6. Name any other material that can be used instead of parchment paper in the above experiment.
7. Mention two advantages of the process for the plants.

Answer 1

1. The process is osmosis.
2. Osmosis is the flow of water molecules from their greater concentration towards their lower concentration across a semi-permeable membrane.
3. An hour or so later, you will see that the level of liquid in the vertical tube has raised as a result of osmosis-mediated water entering the tube via the goat bladder.
4. Take another thistle funnel filled with simple water and suspend it in another beaker, likewise holding water as a control for comparison. Mark the level on its stem.
   1. The thistle funnel's liquid level in the control will not change after a few hours.
   2. While in the beaker in control will remain the same, the water level in the experiment's beaker will somewhat drop.
   3. Should one taste the water from the experiment's beaker, it is not sweet.
5. 1. Root hairs are components of root cells, so they correspond to the cell.
   2. The cell resembles parchment paper.
   3. The cell's surroundings match water in a beaker.
6. Cellophane can be used.
7. 1. It is important for water absorption from the ground.
   2. It results in turgidity of the cells, which is crucial for preserving the form and structure of many organ components of a plant.