Chapter 25 of 32
Revision Notes
Plant Growth and Development — Revision Notes
CUET (UG) · Biology
Quick revision notes for Plant Growth and Development — key concepts, formulas, and definitions for CUET (UG) Biology preparation.
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Key concepts, formulas, and definitions from Plant Growth and Development for CUET (UG) Biology preparation.
Key Topics to Revise
1
13.1 Plant Growth - Fundamental Concepts
- Growth is defined as an irreversible permanent increase in size of an organ, its parts, or individual cells
- Plant growth is indeterminate (continues throughout life) unlike animals which show determinate growth
- Growth occurs through metabolic processes requiring energy expenditure
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13.2 Differentiation, Dedifferentiation and Redifferentiation
- Differentiation involves permanent qualitative changes in cell structure, chemistry, and physiology
- Differentiation occurs through activation or repression of specific genes
- Example: Tracheary elements lose protoplasm and develop lignified secondary walls for water transport
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13.3 Development and Plasticity
- Development is the sequence of changes from formation to death including growth and differentiation
- Plant development stages: seed germination → seedling → juvenile → mature → flowering → senescence → death
- Development occurs at cellular, tissue, organ, and whole plant levels
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13.4 Plant Growth Regulators - Auxins
- Auxins are weakly acidic hormones with unsaturated ring structure
- Natural auxins: IAA (Indole-3-acetic acid), IBA (Indole-3-butyric acid)
- Synthetic auxins: NAA, 2,4-D, MCPA - used as herbicides and rooting agents
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Key Concepts
Growth is defined as an irreversibleGrowth rates can be arithmetic (linearDifferentiation is the process where cellsDevelopment is the sum of growthAuxins are weakly acidic growth hormones
Frequently Asked Questions
What topics are covered in Plant Growth and Development for CUET (UG)?
Plant Growth and Development is an important chapter in CUET (UG) Biology. It covers key concepts and formulas that are frequently tested in the exam. Key topics include: 13.1 Plant Growth - Fundamental Concepts, 13.2 Differentiation, Dedifferentiation and Redifferentiation, 13.3 Development and Plasticity, 13.4 Plant Growth Regulators - Auxins.
How important is Plant Growth and Development for CUET (UG)?
Plant Growth and Development is a frequently tested chapter in CUET (UG) Biology. Questions from this chapter appear regularly in previous year papers. There are 83 practice questions available for this chapter.
How to prepare Plant Growth and Development for CUET (UG)?
Start by understanding the core concepts, then solve practice questions. Focus on formulas and their applications. Use revision notes for quick review before the exam.
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