Advertisements
Advertisements
प्रश्न
Transpiration is a necessary evil in plants. Explain.
उत्तर
Transpiration is a necessary evil in plants because it is inevitable but potentially harmful. Loss of water from the plant results in wilting and causes the death of a plant if a condition of drought is experienced. But transpiration is of great significance for the plant.
- Water is conducted, in most tall plants due to transpiration pull.
- Minerals dissolved in water are distributed throughout the plant body by Transpiration Stream.
- Evaporation of water from the cells of leaves has a cooling effect on plants.
- The wet surface of leaf cells allows gaseous exchange.
संबंधित प्रश्न
An apparatus, as shown below, was set up to investigate a physiological process in plants. The setup was kept in sunlight for two hours. Droplets of water were then seen inside the bell jar. Answer the questions that follow:
- Name the process being studied.
- Explain the process named above in Q.3(a)(i).
- Why was the pot covered with a plastic sheet?
- Suggest a suitable control for this experiment.
- Mention two ways in which this process is beneficial to plants.
- List three adaptations in plants to reduce the above mentioned process.
The loss of water in the form of water vapour through stomata on leaves is known as ___________.
Under what conditions do plant transpire more quickly?
Briefly explain, how transpiration helps in upward conduction of water in plants?
Fill in the blank with the suitable term given below:
Transpiration is more when the wind is blowing _____.
How does transpiration help in the uptake of water from the soil?
Give a reason.
What happens to the movement of the air-bubble if the apparatus shown above is kept in sunlight.
Distinguish between the following :
Cuticular transpiration and lenticular transpiration
An apparatus as shown below was set up to investigate a physiological process in plants. The setup was kept in sunlight for two hours. Droplets of water were then seen inside the bell jar. Answer the questions that follow:
Why was the pot covered with a plastic sheet?
An apparatus as shown below was set up to investigate a physiological process in plants. The setup was kept in sunlight for two hours. Droplets of water were then seen inside the bell jar. Answer the questions that follow:
List three adaptations in plants to reduce the above mentioned process.
Design an experiment to demonstrate the transpiration process.
Give Technical Term
When cobalt chloride paper is placed on lower and upper surface of the leaf, the paper of which side becomes more pink?
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Calcium chloride paper is used to demonstrate transpiration
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Moist cobalt chloride paper is blue in colour.
Boojho’s uncle was hospitalised and put on dialysis after a severe infection in both of his kidneys.
What is dialysis?
ABA (Abscisic acid) is called a stress hormone. How does this hormone overcome stress conditions?
The radio labelled carbon in carbon dioxide supplied to potato plants in an experiment was seen in the tuber eventually. Trace the movement of the labelled carbon dioxide.
Observe the following diagram and identify the process and its significance from the following options:
A root hair is derived from ______ cell.
