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    CBSE

    Subject

    Biology
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    NEET Biology : Plant Growth and Development

    Multiple Choice Questions

    31.

    Pneumatophores occur in

    • Halophytes

    • Free-floating hydrophytes

    • Submerged hydrophytes

    • Carnivorous plants

    Answer
    • 32.

    Which of the following properties is shown by cytokinins?

    • Delay leaf senescence

    • Cause leaf abscission

    • Promote seed dormancy

    • Promote stornatal closing

    Answer
    • 33.

    Phellogen and phellem respectively denote

    • Cork and cork cambium

    • Cork cambium and cork

    • Secondary cortex and cork

    • Cork and secondary cortex

    Answer
    • 34.

    Sweet potato is a modified

    • Stem

    • Adventitious root

    • Rhizome

    • Tap root

    Answer
    • 35.

    Which one of the following generally acts as an antagonist to gibberellins?

    • Zeatin

    • Ethylene

    • ABA

    • IAA

    Answer
    • 36.

    Which of the following is not an auxin?

    • IM

    • IBA

    • Zeatin

    • NM

    Answer
    • 37.

    Which one correctly describe reproduction and life cycle of fern?

    • Spore → Gamete → Prothallus → Sporophyte

    • Gamete → Spore → Prothallus → Plant

    • Prothallus → Sporophyte → Gamete → Fern

    • Sporangia → Spore → Prothallus → Sporophyte → Plant

    Answer
    • 38.

    Plants having little or no secondary growth are

    • Grasses

    • Deciduous angiosperms

    • Cycads

    • Conifers

    Answer
    • 39.

    Hormone inducing fruit ripening is

    • Cytokinin

    • Ethylene

    • Aabscissic acid

    • Gibberellic acid

    Answer
    • 40.

    Genetic dwarfism can be overcome by

    • Gibberellin

    • Ethylene

    • Auxin

    • ABA

    Answer
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