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Chemoreception in Organisms

Kerala Board · Class 10 · Biology

Complete topic list for Chemoreception in Organisms in Kerala Board Class 10 Biology. Key concepts, sub-topics, and what to focus on for board exams.

44 questions24 flashcards5 concepts

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4 Topics · Kerala Board Class 10 Biology

Topics in Chemoreception in Organisms

1

Discovery of Plant Hormones - F.W. Went's Experiment

  • F.W. Went (1903-1990), a Dutch botanist, discovered auxin through his coleoptile experiment
  • He cut oat plant coleoptiles and placed them on agar jelly, which absorbed the chemical substance
  • When agar blocks were placed on cut coleoptiles, growth occurred toward the upper side
2

Hormones and Life Processes

  • Hormones are present in both plants and animals
  • Target cells contain specific receptors for particular hormones
  • Receptors are located in cell membranes and within cells
3

Action of Auxin and Phototropism

  • Auxin tends to move away from light (negative phototropism)
  • When sunlight falls vertically, auxin distributes uniformly on all sides
  • When light comes from one direction, auxin moves to the shaded side
4

Plant Hormones and Their Functions

  • Auxins: Increase stem length, inhibit lateral bud growth, regulate tropic movements, stimulate flower and fruit formation
  • Gibberellins: Break seed dormancy, stimulate cell division in stems and roots, influence fruit and seed growth
  • Cytokinins: Stimulate cell division and differentiation, promote lateral bud growth, delay senescence, retain leaf green color, transport nutrients

Key Concepts

Dutch botanist FHormones function by binding to specificFive main plant hormones control differentPlants respond to day and nightThe thyroid gland produces thyroxine (controls

Frequently Asked Questions

What are the important topics in Chemoreception in Organisms for Kerala Board Class 10 Biology?
Chemoreception in Organisms covers several key topics that are frequently asked in Kerala Board Class 10 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Chemoreception in Organisms — Kerala Board Class 10 Biology?
Understand the core concepts first, then work through the 44 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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