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Learn about the processes of growth, differentiation, development and plant growth regulators in flowering plants. Explore the factors that control and influence the development of plant organs and tissues.
Mar 17, 2018 · CHAPTER-15. Plant Growth and Development class 11 Notes Biology. Root, stem, leaves, flowers, fruits and seeds arise in orderly manner in plants. The sequence of growth is as follows- Plants complete their vegetative phase to move into reproductive phase in which flower and fruits are formed for continuation of life cycle of plant.
Plant Growth and Development Class 11 Notes - Chapter 15. According to the CBSE Syllabus 2023-24, this chapter has been renumbered as Chapter 13. Like animals, even plants undergo growth and development. But unlike animals which have a definite lifespan, most plants can grow indefinitely.
- 2 min
- Plant growth rate can be measured as the relative increase in leaf area over time by substituting total plant leaf area for total biomass in the co...
- Auxins are a growth factor hormone which is naturally produced by the plant itself.
- Growth promoters promote flowering, the formation of seeds, cell division etc. Whereas growth inhibitors, as the name suggests, inhibit the growth...
- Define growth, differentiation, development, dedifferentiation, redifferentiation, determinate growth, meristem and growth rate. Solution: Growth is defined as a vital process which brings about an irreversible and permanent change in the shape, size, form, weight and volume of a cell, organ or whole organism, accompanied with increase in dry matter.
- Why is not any one parameter good enough to demonstrate growth throughout the life of a flowering plant? Solution: A flowering plant consists of a number of organs viz., roots, stem, leaves, flowers, fruits etc.
- Describe briefly. (a) Arithmetic growth. (b) Geometric growth. (c) Sigmoid growth curve. (d) Absolute and relative growth rates. Solution: (a) Arithmetic growth: If the length of a plant organ is plotted against time it shows a linear curve, the growth is called arithmetic growth.
- List five main groups of natural plant growth regulators. Write a note on discovery, physiological functions and agricultural/ horticultural applications of any one of them.
Feb 9, 2024 · The NCERT Class 11 Biology Chapter 15 notes give you a basic idea of the botany chapter, plant growth and development phenomenon in higher plants. The notes for Class 11 biology chapter 15 are a part of Biology class 11 unit 4 Plant physiology.
- Irshad Anwar
- Growth is an irreversible permanent increase in size, this can take place at the cellular, tissue, or organ level whereas development is the sum of...
- Meristematic tissues/meristems are regions of active cell division, cells of meristems are unspecialised and divide through mitosis.
- Cells that have lost their dividing capacity restart dividing under certain conditions, this phenomenon is called dedifferentiation.
- Auxins, Gibberellins, and Cytokinins are growth-promoting phytohormones.
- The aqueous solution of ethephon is widely used as an artificial ethylene source as it releases ethylene slowly. Ethephon is used to hasten fruit r...
- Some plants flower only when the duration of light exposure is less than the critical duration; such plants are called short-day plants.
Plant Growth and Development Class 11 NCERT Solutions cover answers and explanations to all the questions given in the chapter as per CBSE guidelines. These solutions help in the easy and simple understanding of the topics covered in the chapter so that students can learn and prepare for their exams in a systematic way.
Development is the sum of two processes: growth and differentiation. To begin with, it is essential and sufficient to know that the development of a mature plant from a zygote (fertilised egg) follow a precise and highly ordered succession of events.
