Plant Growth and Development

Multiple Choice Questions

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Which one of the following is a growth regulator produced by plants?

  • Naphthalene acetic acid

  • Zeatin

  • 2,4-dichlorophenoxy acetic acid

  • Benzyl aminopurine

B.

Zeatin

Zeatin is a naturally occurring cytokinin (type of plant growth regulator) isolated from the endosperm of a corn. It is remarkably known to be more active than any other cytokinin, while others growth regulators given in the, potions such as 2, 4 dichlorophenoxy acetic acid (2, 4-D), Naphthalene Acetic Acid (NAA) and benzylaminopurine are all synthetic plant growth regulators.

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    During seed germination its stored food is mobilised by

    • ethylene

    • cytokinin

    • ABA

    • gibberellin

    Answer

    Name of a gaseous plant hormone is

    • IAA

    • gibberellin

    • ethylenes

    • abscisic acid

    Answer

    Flowering dependent on cold treatment is

    • cryotherapy

    • cryogenics

    • cryoscopy

    • vernalisation

    Answer

    Vascular tissue in higher plants develop from which of the following

    • Procambium 

    • Protoderm

    • Periblem

    • Cortex

    Answer
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    A substance that induces dormancy of seed is

    • ABA

    • GA

    • thio-urea

    • cytokinin

    Answer

    Cellular totipotency was first demonstrated by

    • F C Steward

    • Robert Hooke

    • T Schwann

    • A v Leeuwenhoek

    Answer

    The discovery of gibberellins is related with one of the following

    • blast disease of rice

    • rust disease of wheat

    • bakane disease of rice

    • early blight disease of potato

    Answer

    Choose the minor carp from the following

    • Cyprinus carpio

    • Anguilla sp

    • Labeo bata

    • cetanophyrngodon idella

    Answer
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    Which of the following is called stress hormone?

    • Abscisic acid

    • Auxin

    • Cytokinin

    • Gibberellic acid

    Answer
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