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Chemical Coordination in Plants

ICSE · Class 10 · Biology

Quick revision notes for Chemical Coordination in Plants — ICSE Class 10 Biology. Key concepts, formulas, and definitions for last-minute revision.

42 questions35 flashcards5 concepts

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An infographic classifying plant growth regulators into promoters (Auxins, Gibberellins, Cytokinins) and inhibitors (Abscisic Acid, Ethylene), with their general functions.
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Key Topics to Revise

1

Plant Growth Regulators

  • Plant growth regulators are also called plant hormones or phytohormones.
  • They are organic substances produced in one part of the plant body and act in another part.
  • They are mainly transported through phloem.
2

Auxins

  • Auxins were the first plant hormones to be discovered.
  • Auxins are produced by growing tips of stem and root.
  • Indole acetic acid is the most abundant and powerful naturally occurring auxin.
3

Gibberellins

  • More than 100 types of gibberellic acids are known.
  • Gibberellins are produced in young leaves, plastids of immature seeds, or even roots.
  • Gibberellins cause elongation of internodes.
4

Cytokinins

  • Cytokinin is produced in meristems.
  • It promotes cell division and cell enlargement.
  • It delays senescence, which means ageing of plants.

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Full Notes

Key Concepts

Plant growth regulators are organic substancesAuxins were the first plant hormonesAuxin causes stem elongationGibberellins are growth promotersCytokinins are growth promoters produced

Frequently Asked Questions

What are the important topics in Chemical Coordination in Plants for ICSE Class 10 Biology?
Key topics in Chemical Coordination in Plants include Auxin Effect: Concentration vs Growth Response in Root and Shoot, Plant Growth Regulators — Complete Overview, Plant Growth Regulators — Complete Classification. These are the concepts ICSE Class 10 examiners draw on most — study them first, then practise related questions.
How to score full marks in Chemical Coordination in Plants — ICSE Class 10 Biology?
Understand the core concepts first, then work through the 42 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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