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Excess water collecting in the form of d...

Excess water collecting in the form of droplets around special openings of veins near the tip of grass blades, and leaves of many herbs is called is known as

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Guttotion
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Excess water collects in the form of droplets around special openings of veins near the tip of grass blades and leaves of many herbaceous parts. Such water loss is known as A. guttation B. nutation C. excretion D. secretion

Loss of water in the form of liquid droplets around special openings of veins near the tip of grass blades is called

The droplets are seen at the end of veins on the grass blades in early morning hours. What is it called?

Near the tips of grass blades there is water loss in the form of liquid droplet around special openings of veins. This occurs due to

Loss of water in the form of liquid droplets near the tip of grass blades is called

the process responsible for facilitating loss of water in liquid form from the tip of grass blades at night and in early morning is:

Many lyophilic sols and few lyophobic sols when coagulated under some special conditions changes into semi rigid mass, enclosing whole amount of liquid within of liquid within itself, it is called gel and the process is called gelation. Gelatin, agar-agar, gum-Arabic can be converted into gels by cooling them under moderate concentration conditions. Hydrophobic sols like silicic acid. Al(OH)_(3) are prepared by double decomposition and exchanged of solvent method. Types of gel : 1. Syneresis/weeping of gel : The spontaneous liberation of liquid from a gel is called syneresis or weeping of gels. It is reverse of swelling. e.g., geletin, agar-agar show syneresis at low concentration while silicic shows it at high concentration. 2. Imbibition or swelling of gel : When gel is kept in a suitable liquid (water) it absorb large volume of liquid. The phenomenon is called imbibition or sweeling of gel. 3. Thixotropic : Some gels when shaken to form a sol, on keeping changes into gel are termed as thixotropic gel and phenomenon is called thixotropy. e.g., gelatin and silica liquify on shaking changing into corresponding sol and the sol on keeping changes back into gel. Some types of gels like gelatin and silica liquify on shaking thereby changing into sols. The sols on standing change back into gels. This process is know as :

Comprehension # 1 Many lyophilic sols and few lyophobic sols when coagulated under some special conditions changes into semi rigid mass, enclosing whole amount of liquid within itself, it is called gel and the process is called gelation, Gelatin Agar-agar, gum-Arabic can be converted into gels by cooling them under moderate concentration conditions. Hydrophobic sols like silicic acid. Al(OH)_(3) are prepared by double decomposition and exchange of solvent method. Types of Gel : (i) Elastic gel : Those gel which have elastic properties. Ex : Gelatin, Strach, Agar-agar etc. (ii) Non-elastic gel : Those gel which are rigid. Ex : Silica gel. Properties of Gel : 1. Syneresis/weeping of gel : The spontaneous liberation of liquid from a gel is called syneresis or weeping of gels. It is reverse of swelling. Ex : Gelatin, Agar-Agar show syneresis at low concentration while sillicic acid shows it at high concentration. 2. Imbibition or swelling of gel : When gel is kept in a suitable liquid (water) it absorb large volume of liquid. The phenomenon is called imbibition or swelling of gel. 3. Thixotropic : Some gels when shaken to form a sol, on keeping changes into gel are termed as thixotropic gel and phenomenon is called thixotropy. Ex : Gelatin and silica liquify on shaking changing into corresponding sol and sol on keeping changes back into gel. The process of imbibing water when elastic gel are placed in water is called :

Comprehension # 1 Many lyophilic sols and few lyophobic sols when coagulated under some special conditions changes into semi rigid mass, enclosing whole amount of liquid within itself, it is called gel and the process is called gelation, Gelatin Agar-agar, gum-Arabic can be converted into gels by cooling them under moderate concentration conditions. Hydrophobic sols like silicic acid. Al(OH)_(3) are prepared by double decomposition and exchange of solvent method. Types of Gel : (i) Elastic gel : Those gel which have elastic properties. Ex : Gelatin, Strach, Agar-agar etc. (ii) Non-elastic gel : Those gel which are rigid. Ex : Silica gel. Properties of Gel : 1. Syneresis/weeping of gel : The spontaneous liberation of liquid from a gel is called syneresis or weeping of gels. It is reverse of swelling. Ex : Gelatin, Agar-Agar show syneresis at low concentration while sillicic acid shows it at high concentration. 2. Imbibition or swelling of gel : When gel is kept in a suitable liquid (water) it absorb large volume of liquid. The phenomenon is called imbibition or swelling of gel. 3. Thixotropic : Some gels when shaken to form a sol, on keeping changes into gel are termed as thixotropic gel and phenomenon is called thixotropy. Ex : Gelatin and silica liquify on shaking changing into corresponding sol and sol on keeping changes back into gel. Which of the following is used to adsorb water ?

ALLEN-TRANSPORT IN PLANTS-EXERCISE
  1. Name a plant seed having obligate association with the mycorrihiza mea...

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  2. As various ions from the soil are actively transported into the vascul...

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  3. Excess water collecting in the form of droplets around special opening...

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  4. From which compound plants obtain their carbon and most of their oxyge...

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  5. In root endodermis, layer of which substance provide ability to active...

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  6. The chief sinks for the mineral elements in plants are

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  7. From which part mineral ions are frequently remobilised?

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  8. Write the elements which are most readily mobilised from senescent pa...

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  9. The main component of phloem sap is

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  10. Which substances are translocated through phloem.

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  11. Which cell's turgidity causes opening or closing of stomata.

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  12. Name the external factors which affect the rate of transpiration

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  13. Discuss the different environmental and plant factors affecting transp...

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  14. Ability to rise in thin tubes and ability to resist pulling force are ...

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  15. The phenomenon in which water molecules are atttracted to each other i...

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  16. An ability to resist a pulling force of water (tensile strength) is de...

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  17. The mechanism universally accepted to describe the translocation of su...

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  18. A simple experiment called is used to identify the tissues through whi...

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  19. Comparison of different mechanisms of transport

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  20. Over small distances substances move by (A) and by (B) supplemented by...

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