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Chapter 7 of 16
Chapter Summary

Chemical Coordination in Plants

ICSE · Class 10 · Biology

Summary of Chemical Coordination in Plants for ICSE Class 10 Biology. Key concepts, important points, and chapter overview.

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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Overview

Chemical coordination in plants is controlled by plant growth regulators, also called plant hormones or phytohormones. These are organic substances made in one part of the plant and transported to another part, mainly through phloem. They control growth, development, movement, flowering, fruit forma

Key Concepts

Plant growth regulators are organic substances

Plant growth regulators are organic substances produced in one part of the plant body and act in another part. They are mainly transported through phl

Auxins were the first plant hormones

Auxins were the first plant hormones to be discovered. They are produced by growing tips of stem and root. Indole Acetic Acid is the most abundant and

Auxin causes stem elongation

Auxin causes stem elongation, induces cell division, is responsible for apical dominance, prevents abscission, induces parthenocarpy, and promotes fem

Gibberellins are growth promoters

Gibberellins are growth promoters. More than 100 types are known. They are produced in young leaves, plastids of immature seeds, or even roots. They c

Cytokinins are growth promoters produced

Cytokinins are growth promoters produced in meristems. They promote cell division and cell enlargement, delay senescence, oppose apical dominance, pro

Learning Objectives

  • Understand the meaning of plant growth regulators and their transport in plants.
  • Identify the main growth promoters: auxins, gibberellins, and cytokinins.
  • Identify the main growth inhibitors: ethylene and abscisic acid.
  • Explain how auxin controls elongation, apical dominance, phototropism, geotropism, abscission, parthenocarpy, and femaleness.
  • Describe the functions of gibberellins in elongation, flowering, germination, parthenocarpy, and dwarf plants.

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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