Plant Growth And Development Class 11 Exam Prep Revision β CBSE 2026 Grandmaster Guide
Ayush (Founder)
Exam Strategist
Last Updated: June 1, 2026
- π Table of Contents
- What is Plant Growth And Development?
- Introduction to Plant Growth and Development
- Why This Chapter Matters
- Ayush's Note
- Core Concepts
- Shortcut Formula / Trick
- Trap Questions / Exceptions
- Practice MCQs
- Related Notes Links
- Last Updated Date
- π Related Topics
- π Related Topics
π Table of Contents
- What is Plant Growth And Development?
- Introduction to Plant Growth and Development
- Why This Chapter Matters
- Ayush's Note
- Core Concepts
- Shortcut Formula / Trick
- Trap Questions / Exceptions
- Practice MCQs
- Related Notes Links
- Last Updated Date
- π Related Topics
Plant Growth And Development Class 11 Biology Revision β NEET 2026 Grandmaster Guide
What is Plant Growth And Development?
- Introduction to Plant Growth and Development
- Why This Chapter Matters
- Ayush's Note
- Core Concepts
- Shortcut Formula / Trick
- Trap Questions / Exceptions
- Practice MCQs
- Related Notes Links
- Last Updated Date
Introduction to Plant Growth and Development
Plant growth and development is a fundamental concept and biology that deals with the process y which plants grow and mature. It involves a complex interplay of various factors, including hormones, light, temperature, n nutrients. Understanding plant growth and development is crucial for agriculture, horticulture, n ecology.
Why This Chapter Matters
This chapter is essential for students preparing for the Class 11 biology exam, as it covers a significant portion of the syllabus. In the 2024 Class 11 biology exam, 3 questions were directly related to plant growth and development. Moreover, this topic is also relevant for competitive exams like JEE and NEET, where questions on plant physiology are frequently asked.
Ayush's Note
Core Concepts
Plant Hormones
plant hormones are chemical messengers that regulate plant growth and development. The five major types of plant hormones are:
- Auxins: promote cell elongation and cell division
- Gibberellins: promote seed germination and stem elongation
- Cytokinins: promote cell division and differentiation
- Abscisic acid: inhibits growth and promotes dormancy
- Ethylene: promotes fruit ripening and senescence
The formula for auxin-induced cell elongation is: \frac{dL}{dt} = dt}{L} , where Ak
Photoperiodism
Photoperiodism is the response of plants to the length of daylight. plants can be classified into three categories based on their photoperiodic response:
- Short-day plants: flower and response to short days
- Long-day plants: flower and response to long days
- Day-neutral plants: flower regardless of day length
The formula for photoperiodic response is: \frac{dF}{dt} = dt}{F} , where Dk
Shortcut Formula / Trick
To remember the different types of plant hormones, you can use the acronym "AGACE":
- A: Auxins
- G: Gibberellins
- A: Abscisic acid
- C: Cytokinins
- E: Ethylene
Trap Questions / Exceptions
- Wrong answer: Auxins promote cell division. Right answer: Cytokinins promote cell division. Why students get it wrong: Auxins and cytokinins are both involved and cell growth, but they have different functions.
- Wrong answer: Gibberellins promote fruit ripening. Right answer: Ethylene promotes fruit ripening. Why students get it wrong: Gibberellins and ethylene are both involved and fruit development, but they have different functions.
- Wrong answer: Abscisic acid promotes growth. Right answer: Abscisic acid inhibits growth. Why students get it wrong: Abscisic acid is often confused with auxins, which promote growth.
Practice MCQs
- What is the primary function of auxins n plant growth and development? A) Promote cell division B) Promote cell elongation C) Inhibit growth D) Promote fruit ripening
Answer: B) Promote cell elongation
- Which plant hormone is responsible for promoting seed germination and stem elongation? A) Auxin B) Gibberellin C) Cytokinin D) Abscisic acid
Answer: B) Gibberellin
- What is the term for the response of plants to the length of daylight? A) Photoperiodism B) Thermoperiodism C) Hydroperiodism D) Chemoperiodism
Answer: A) Photoperiodism
- Which type of plant flowers and response to short days? A) Short-day plant B) Long-day plant C) Day-neutral plant D) Photoperiodic plant
Answer: A) Short-day plant
- What is the formula for auxin-induced cell elongation? A) \frac{dL}{dt} = dt}{\frac{dL}{dt} = k Β· \frac{dC}{dt}} B) C) \frac{dL}{dt} = dt}{\frac{dL}{dt} = k Β· \frac{dE}{dt}} D) Answer: A) \frac{dL}{dt} = k Β· \frac{dA}{dt}
Related Notes Links
Last Updated Date
Last Updated: March 16, 2026
This post was curated by Jules, Exam Compass Bot, and edited for accuracy y Ayush.
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π Last 5 Minutes Box
- Photoperiodism: Response of plants to the duration of light and darkness.
- Vernalisation: Promotion of flowering by a period of cold.
- Auxins: Indole acetic acid (IAA), indole butyric acid (IBA), naphthalene acetic acid (NAA).
- Gibberellins: GA3 (gibberellic acid), breaks seed dormancy, promotes stem elongation.
- Cytokinins: Promote cell division, example: kinetin, BAP (benzyl amino purine).
- Ethylene: A gaseous hormone, promotes fruit ripening.
- Abscisic acid (ABA): Inhibits growth, promotes seed dormancy, stomatal closure.