Transport in Plants

Transport in Plants

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Advanced Botany

Plant Growth and Development
Organisms and Populations
Ecosystem
Biodiversity and Conservation
Environmental Issues
Microbes in Human Welfare
Strategies for Enhancement in Food Production
Molecular Basis of Inheritance
Principles of Inheritance and Variation
Sexual Reproduction in Flowering Plants
Reproduction in Organisms
The Living World
Respiration in Plants
Photosynthesis
Mineral Nutrition
Transport in Plants
Cell Cycle and Cell Division
Cell-The Unit of Life
Anatomy of Flowering Plants
Morphology of Flowering Plants
Plant Kingdom
Biological Classification
  1. Water potential is equal to








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    Water potential is defined as the difference between the chemical potential of water at any point in a system and that of pure water under standard conditions. The unit of measurement of water potential is pascal, Pa (1 mega pascal, Mpa = 10 bars). It is represented by greek letter PSi (Ψ). Water potential has two components-solute potential which is always negative and pressure potential which is usually positive. Therefore water potential Ψw is expressed as :
    Ψw = Ψs + Ψp

    Correct Option: D

    Water potential is defined as the difference between the chemical potential of water at any point in a system and that of pure water under standard conditions. The unit of measurement of water potential is pascal, Pa (1 mega pascal, Mpa = 10 bars). It is represented by greek letter PSi (Ψ). Water potential has two components-solute potential which is always negative and pressure potential which is usually positive. Therefore water potential Ψw is expressed as :
    Ψw = Ψs + Ψp

  1. Roots play insignificant role in absorption of water in :








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    Pistia is a hydrophyte plant where absorption of water by root is not important.

    Correct Option: A

    Pistia is a hydrophyte plant where absorption of water by root is not important.

  1. A column of water within xylem vessels of tall trees does not break under its weight because of :








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    Due to tensile strength of water, a column of water within xylem vessels of tall trees does not break under its weight.

    Correct Option: A

    Due to tensile strength of water, a column of water within xylem vessels of tall trees does not break under its weight.

  1. Guttation is the result of :








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    The main cause of guttation in plants is root pressure. During night when root pressure is high, water drops ooze out with the assistance of special structures called hydathodes which help in guttation.

    Correct Option: D

    The main cause of guttation in plants is root pressure. During night when root pressure is high, water drops ooze out with the assistance of special structures called hydathodes which help in guttation.

  1. A bottle filled with previously moistened mustard seeds and water was screw capped tightly and kept in a corner. It blew up suddenly after about half an hour. The phenomenon involved is








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    Imbibition pressures developed during germination of seeds and spores are of higher magnitude.

    Correct Option: B

    Imbibition pressures developed during germination of seeds and spores are of higher magnitude.