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Questions and Answers
Which chemicals are broadly classified as plant growth regulators?
Which chemicals are broadly classified as plant growth regulators?
- Indole compounds and adenine derivatives (correct)
- Lipids and vitamins
- Carbohydrates and proteins
- Enzymes and hormones
Which group of plant growth regulators is responsible for promoting activities like cell division and flowering?
Which group of plant growth regulators is responsible for promoting activities like cell division and flowering?
- Carotenoid derivatives
- Terpenes and gases
- Ethylene and ABA
- Auxins, Gibberelins & Cytokinins (correct)
Who discovered the influence causing the bending of coleoptile towards a light source (Phototropism)?
Who discovered the influence causing the bending of coleoptile towards a light source (Phototropism)?
- Louis Pasteur
- Marie Curie
- Charles Darwin & his son Francis Darwin (correct)
- Gregor Mendel
What caused the foolish seedling disease in rice seedlings, leading to the discovery of Gibberelins?
What caused the foolish seedling disease in rice seedlings, leading to the discovery of Gibberelins?
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Which plant growth regulator plays an important role in responses to wounds and stress, and regulates dormancy and abscission?
Which plant growth regulator plays an important role in responses to wounds and stress, and regulates dormancy and abscission?
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Study Notes
Plant Growth Regulators
- Hormones, vitamins, and other chemicals are broadly classified as plant growth regulators.
Promoters of Plant Growth
- Auxins are responsible for promoting activities like cell division and flowering.
Discovery of Phototropism
- Charles Darwin and his son Francis Darwin discovered the influence causing the bending of coleoptile towards a light source, known as phototropism.
Discovery of Gibberelins
- The foolish seedling disease in rice seedlings, which is a fungal disease, led to the discovery of Gibberelins.
Functions of Abscisic Acid
- Abscisic acid plays an important role in responses to wounds and stress, and regulates dormancy and abscission.
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