Plant Growth and Development

Plant Growth and Development

Easy Questions

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. Mowing grass lawn facilitates better maintenance because








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    Apical dominance is a common observation in vascular plants. If apical meristem is intact & growing, the growth of lateral tips is suppressed. According to Thimann & Skoog the auxin, synthesized in apical meristem, is translocated downwards & inhibits the growth of lateral tips. That is why mowing grass lawns facilitate better maintenance.

    Correct Option: B

    Apical dominance is a common observation in vascular plants. If apical meristem is intact & growing, the growth of lateral tips is suppressed. According to Thimann & Skoog the auxin, synthesized in apical meristem, is translocated downwards & inhibits the growth of lateral tips. That is why mowing grass lawns facilitate better maintenance.

  1. Proteinaceous pigment which control activities concerned with light








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    Borthwick & Hendricks (1952) gave the concept of phytochrome. Phytochrome is a coloured protein pigment located in plasma membrane to perceive the photoperiodic stimulus in leaves. It may exist in two interconvertable forms Pr and Pfr (red and far red light absorbing forms).

    Correct Option: A

    Borthwick & Hendricks (1952) gave the concept of phytochrome. Phytochrome is a coloured protein pigment located in plasma membrane to perceive the photoperiodic stimulus in leaves. It may exist in two interconvertable forms Pr and Pfr (red and far red light absorbing forms).

  1. The method that renders the seed coat permeable to water so that embryo expansion is not physically retarded is








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    Scarification is the breaking of the seed coat barriers which can be done by mechanical or chemical methods.

    Correct Option: D

    Scarification is the breaking of the seed coat barriers which can be done by mechanical or chemical methods.

  1. The response of different organisms to environmental rhythms of light and darkness is called








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    Photoperiodism is the effect of duration of light and darkness on the growth, development and behaviour of an organism.

    Correct Option: B

    Photoperiodism is the effect of duration of light and darkness on the growth, development and behaviour of an organism.

  1. What will be the effect on phytochrome in a plant subjected to continuous red light?








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    Continuous exposure to red light causes
    ⚈ Conversion of Pr to Pfr which is rapidly destroyed.
    ⚈ Inhibition of synthesis of Pr.
    ⚈ Totalamountof phytochromedecreases.

    Correct Option: A

    Continuous exposure to red light causes
    ⚈ Conversion of Pr to Pfr which is rapidly destroyed.
    ⚈ Inhibition of synthesis of Pr.
    ⚈ Totalamountof phytochromedecreases.