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NEET Practice Questions (MCQs) with Answers & Solutions

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All Physics Chemistry Botany Zoology

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Plant growth promotor is not

A. Auxins B. Gibberellins C. Cytokinins D. ABA

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Explanation

Page number-247

15.4 Plant Growth Regulators

15.4.1 Characteristics

Plant Growth And Development

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The PGRs of the other group which play an important role in plant growth inhibiting activities is not

A. Ethylene B. ABA C. GA D. All of these

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Explanation

Page number-247

15.4 Plant Growth Regulators

15.4.1 Characteristics

Plant Growth And Development

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Which of the following hormones is common in both the categories of plant promotor and plant inhibitor?

A. GA B. ABA C. Auxin D. Ethylene

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Explanation

Page number-247

15.4 Plant Growth Regulators

15.4.1 Characteristics

Plant Growth And Development

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Which of the following is wrong?

A. ABA is Growth inhibiting regulator B. Ethylene could fit either of the groups, inhibitors and activators. C. Auxins, GA and Cytokinins are plant promotors D. Ethylene is largely a promotor of growth activities

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Explanation

Page number-247

15.4 Plant Growth Regulators

15.4.1 Characteristics

Plant Growth And Development

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The Discovery of PGRs

A. Four discovery were accidental one was with a planned experiment B. Three discovery were accidental Two were with a planned experiment C. Two discovery were accidental Three were with a planned experiment D. All five we're accidental

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Explanation

Page number-247

15.4 Plant Growth Regulators

15.4.2 The Discovery of Plant Growth Regulators

Plant Growth And Development

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Phototropism is firstly studied by

A. Charles Darwin and his son Francis Darwin B. Charles Darwin and his friend Francis Darwin C. Charles Darwin and his brother Francis Darwin D. Charles Darwin and his colleague Francis Darwin

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Explanation

Page number-247

15.4 Plant Growth Regulators

15.4.2 The Discovery of Plant Growth Regulators

Plant Growth And Development

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……...is the site of transmittable influence that caused the bending of the entire……..

A. Coleorrhiza B. Coleoptile C. Auxin D. Scutellum

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Explanation

Page number-247

15.4 Plant Growth Regulators

15.4.2 The Discovery of Plant Growth Regulators

Plant Growth And Development

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Auxin was isolated by

A. F. W. Went B. Charles Darwin C. Francis Darwin D. F. Skoog

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Explanation

Page number-247

15.4 Plant Growth Regulators

15.4.2 The Discovery of Plant Growth Regulators

Plant Growth And Development

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Find the wrong match.

A. F. W. Went - Oat seedlings B. Charles Darwin - Canary Grass C. Francis Darwin - Canary Grass D. E. Kurosawa- Orange

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Explanation

Page number-247-248

15.4 Plant Growth Regulators

15.4.2 The Discovery of Plant Growth Regulators

Plant Growth And Development

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Internodal segments of tobacco stems, the callus is actually

A. An undifferentiated cell B. A mass of differentiated cell C. A mass of undifferentiated cell D. A differentiated cell

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Explanation

Page number-248

15.4 Plant Growth Regulators

15.4.2 The Discovery of Plant Growth Regulators

Plant Growth And Development

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