Plant Growth and Development
Madhya Pradesh Board · Class 11 · Biology
Summary of Plant Growth and Development for Madhya Pradesh Board Class 11 Biology. Key concepts, important points, and chapter overview.
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Overview
Plant growth and development describe how a plant changes from seed to maturity through ordered, continuous, and regulated processes. Growth means an irreversible permanent increase in size, while development includes growth plus differentiation. Plants keep growing throughout life because meristems
Key Concepts
Growth is an irreversible permanent increase
Growth is an irreversible permanent increase in size of an organ, its parts, or a single cell. It is accompanied by anabolic and catabolic metabolic a
Plants retain the capacity for unlimited
Plants retain the capacity for unlimited growth throughout life because meristems keep producing new cells. This open form of growth keeps adding cell
Meristems are regions of active cell
Meristems are regions of active cell division. Root apical meristem and shoot apical meristem cause primary growth and increase length, while vascular
Growth occurs in three phases
Growth occurs in three phases: meristematic, elongation, and maturation. Meristematic cells are rich in protoplasm and have large nuclei; elongation i
In arithmetic growth
In arithmetic growth, after mitotic division, one daughter cell continues dividing while the other differentiates. It gives a linear growth pattern an
Learning Objectives
- Understand the meaning of growth, differentiation, development, dedifferentiation, and redifferentiation
- Recognise the main phases of plant growth and how growth is measured
- Differentiate between arithmetic growth and geometric growth
- Explain the role of meristems in primary and secondary growth
- Describe plasticity and open differentiation in plants
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