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प्रश्न
Choose the correct answer:
Meaning of ascent of sap is ____________
विकल्प
absorption of water from soil.
alteration of water against gravitational force.
reaching of water upwards against gravitational force.
origin of cohesive force in water.
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उत्तर
Meaning of ascent of sap is reaching of water upwards against gravitational force
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संबंधित प्रश्न
The figure given below is a diagrammatic representation of a part of the cross section of the root in the root hair zone. Study the same and then answer the questions that follow
(i) Name the parts indicated by the guidelines 1 to 4.
(ii) Which is the process that enables the passage of water from the soil into the root hair?
(iii) Name the pressure that is responsible for the movement of water in the direction indicated by the arrows. Define it.
(iv) Due to an excess of this pressure sometimes drops of water are found along the leaf margins of some plants especially in the early mornings. What is the phenomenon called?
(v) Draw a well labelled diagram of the root hair cell as it would appear if an excess of fertiliser is added to the soil close to it.
Mention whether the following statement is true or false. Correct the false statement by altering the last word only.
The cell wall of the root cell is a differentially permeable membrane.
Choose the correct answer:
Absorption of water from soil takes place by __________
Choose the correct answer:
Wilting of plants occurs when ____________
Mention whether the following statement is true (T) or false (F) and give an explanation in support of your answer.
Guttation in plants occurs maximum at midday.
Draw a diagram of the root hair cell as it would appear when a concentrated solution of fertilizers is added near it.
________ type of tissues are present in epiphytic roots.
Trace the pathway followed by water molecules from the time it enters a plant root to the time it escapes into the atmosphere from a leaf.
What would happen to the leaves of a plant that transpires more water than its absorption in the roots?
