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    CBSE

    Subject

    Biology
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    NEET Biology : Plant Growth and Development

    Multiple Choice Questions

    131.

    The pH of protolasm is

    • 6.0

    • 6.8

    • 7.8

    • 8.2

    Answer
    • 132.

    The hormone, which prevents abscission is

    • IBA

    • ABA

    • NAA

    • Cytokinin

    Answer
    • 133.

    Ethylene is

    • gaseous hormone

    • largest hormone

    • liquid hormone

    • solid hormone

    Answer
    • 134.

    Equipment used for the measurement of growth in plants is known as

    • respirometer

    • auxanometer

    • atmometer

    • potometer

    Answer
    • 135.

    Which of the following induces and promotes cell division?

    • ABA

    • Auxin

    • Cytokinin

    • Gibberellin

    Answer
    • 136.

    GA usually promotes

    • sterility in flowers

    • maleness in flowers

    • femaleness in flowers

    • Both (b) and (c)

    Answer
    • 137.

    Phototropic curvature in Avena coleoptile is the result of uneven distribution of

    • auxin

    • starch

    • gibberellins

    • phytochrome

    Answer
    • 138.

    When an ovary develops into a fruit without fertilization it is called

    • porogamy

    • apospory

    • apogamy

    • parthenocarpy

    Answer
    • 139.

    Induction of cell division and delay in senescence is done by

    • cytokinins

    • auxins

    • GA

    • Co-A

    Answer
    • 140.

    Study of bakanae disease of rice led to discovery of

    • auxins

    • bakery rice

    • Both (a) and (b)

    • gibberellins

    Answer
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