Advertisements
Advertisements
प्रश्न
Multiple Choice Question:
The most widely accepted theory for ascent of sap is ______.
विकल्प
capillarity theory
root pressure theory
diffusion
transpiration pull theory
उत्तर
The most widely accepted theory for ascent of sap is transpiration pull theory.
APPEARS IN
संबंधित प्रश्न
Choose the correct answer:
Meaning of ascent of sap is ____________
Study the experimental setup in the figure and then answer the question that follow.
What is meant by 'semipermeable membrane'?
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 guidelines ‘1’ to ‘5’
(ii) Is the root hair cell unicellular or multi-cellular?
(iii) Draw a labeled diagram of the root hair cell as it would appear if some fertilizer is added to the soil close to it.
(iv) Name the process responsible for the entry of water molecules from the soil into A1 and then A2.
(v) What pressure is responsible for the movement of water in the direction indicated by arrows?
(vi) How is this pressure set up?
Give Technical Term for the following.
Phenomenon of absorption of water by surface attraction.
Fill in the Blank
Leaves get wilted if _________ is removed from the plant.
Draw a neat and labelled diagram of the Root tip showing the root hair zone.
Which part of the root helps in maximum absorption of water and minerals?
Epiphytic plants like orchids absorb water vapours from air with the help of ______ having special tissue called velamen.
Paheli uprooted a rose plant from the soil. Most of the root tips, with root hairs, got left behind in the soil. She planted it in a pot with new soil and watered it regularly. Will the plant grow or die? Give a reason for your answer.
Water in the root enters due to ______.
