Growth and Development in Plants — Chapter Summary
Telangana Open School (TOSS) · Class 12 · Biology
Summary of Growth and Development in Plants for Telangana Open School (TOSS) Class 12 Biology. Plants, like all living organisms, grow and develop.
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Overview
Plants, like all living organisms, grow and develop throughout their life cycle. This chapter explores how plants increase in size and complexity through processes like cell division, elongation, and differentiation. It also explains how internal hormones and external factors like light, temperature
Key Concepts
Growth refers to an irreversible increase
Growth refers to an irreversible increase in size, number, or volume of cells, while development includes all qualitative and quantitative changes suc
Cellular growth occurs in three stages
Cellular growth occurs in three stages: (i) Cell Division (mitosis increases cell number), (ii) Cell Enlargement (cells expand due to water uptake), a
A graph showing plant growth over
A graph showing plant growth over time with three phases: Lag Phase (slow start), Log Phase (rapid growth), and Stationary Phase (growth slows and sto
Chemicals produced in small amounts
Chemicals produced in small amounts that regulate growth. Major types include Auxin (cell elongation), Gibberellins (stem growth, seed germination), C
Germination is the revival of metabolic
Germination is the revival of metabolic activity in seeds leading to a new plant. Dormancy is a resting phase where seeds do not germinate despite fav
Learning Objectives
- Define growth and development in plants
- Explain the stages of cellular growth and the sigmoid growth curve
- Describe methods to measure plant growth
- Identify external and internal factors affecting plant growth
- Understand the roles of plant hormones (auxin, gibberellins, cytokinins, ethylene, abscisic acid)
Frequently Asked Questions
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Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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