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प्रश्न
Answer the following question.
Define and or explain the term:
Guttation
What is guttation?
उत्तर
- The loss of water in the form of liquid is called guttation.
- It occurs through special structures called water stomata or hydathodes.
संबंधित प्रश्न
The set up shown alongside was kept in sunlight for an hour. It was observed that drops of water appeared on the inside of the polyethylene bag.
- Name the process which is being demonstrated.
- Why was the pot and its soil left uncovered by the polythene bag?
- Why was the pot left in the sunlight?
- Suppose the pot in this experiment was placed inside a dark room instead of placing it in sunlight for some time. What difference will be noticed?
How does transpiration help the roots absorb water and minerals from the soil?
Fill in the blank:
Water is lost from the leaves by__________.
Name the process by which water loss takes place through the leaves.
Give suitable explanation for the following:
Cork and bark of trees help in preventing loss of water
Answer the following question.
Define and or explain the term:
Transpiration
Boojho wanted to test the presence of starch in leaves. He performed the following steps.
- He took a leaf and boiled it in water.
- He placed the leaf in a petri dish and poured some iodine over it.
He did not get the expected result. Which step did he miss? Explain.
Keep some freshly cut flowers in a solution of food colour. Wait for sometime for the dye to rise in the flower, when the stem of the flower is held up in light, coloured strands can be seen inside. Can this experiment demonstrate which tissue is conducting water up the stem?
ABA (Abscisic acid) is called a stress hormone. From where does this hormone get released in leaves?
Briefly describe the following:
Angina Pectoris
