NCERT Solutions for Biology Chapter 15 Plant Growth and Development Class 11 will help you to ace the unsolved problems in the Class 11 Science book prescribed by the NCERT for all the schools of CBSE. These NCERT Solutions presents the best alternative and a very interesting way to learn, which helps to enhance your abilities and help to get ready for CBSE Class 11 exams.
Plant Growth and Development Class 11 Notes from Chapter 15 are prepared by our expert faculties to help you to prepare for your exams in a better way and enhance your score. Our NCERT Solutions provide step by step solutions for the questions given in NCERT textbook as per CBSE Board guidelines and are also prepared according to the exam pattern. For solving your doubts we have a team of teachers who provide live doubt solving session only for you.
In NCERT Solutions for Class 11 Biology Chapter 15, you will understand about plant growth, differentiation, dedifferentiation and redifferentiation, development, plant growth regulators, photoperiodism, vernalisation and seed dormancy, phases of growth, growth rates, conditions for growth, the discovery of plant growth regulators and physiological effects of plant growth regulators, plant growth and development.
Growth is an irreversible and permanent process which can be seen by the increase in the length, size of the plant cells and tissues.
Few of the examples showing the growth in plants can be depicted as the lengthening of the roots and stem.
The increase in the thickness of the woody plants during their life span is also an example of growth process in plants.
It is a process in which the cells derived from the apical meristem (root and shoot apex) and the cambium undergo structural changes in the cell wall and the protoplasm.
These structural changes result in the achievement of the specific function.
One of the major example of differentiation in plants is the formation of interfascicular and cork cambium which is derived from the fully differentiated Parenchyma cells.
Plant development is referred to as the various continuous changes occurring in the plant body.
The process involves embryogenesis followed by formation of the primary plant body (embryonic root and embryonic shoot) and continuous production of new plant parts such as roots, leaves, branches, and flowers.
The end stage of plant development is senescence.
It is the process in which permanent plant cells regain the power to divide under certain conditions.
Few of the example of dedifferentiation in plants are as follows:
Parenchymatous medullary rays get dedifferentiated into interfascicular cambium in dicotyledonous stem.
Differentiated parenchymatous cells get dedifferentiated into cork cambium.
It is the process in which de-differentiated cells become mature again and lose their capacity to divide.
The example of the process of re-differentiation in plants is the formation of secondary phloem, secondary xylem, secondary cortex, cork, etc.
This is redifferentiated from interfascicular cambium and cork cambium.
The type of plant growth which gets inhibited or limited at a certain stage.
Examples of determinate growth is as follows:
The limitation of growth of the stem in an inflorescence or other reproductive structure.
The branches of the stem stop growing continuously while it is deriving from the main branch.
Meristem is the specialised regions in the plant which is specialized in the divisions of the active cells.
There are three types of meristems that are apical meristem, lateral meristem, and intercalary meristem.
Apical meristem is the tip of the plat root or stem which is capable of division and growth.
The type of meristem located in the lateral region of the plants and responsible for increasing the lateral growth of the plants , is defined as the lateral meristem.
The type of meristem located in the middle position of the plants and is associated with the growth in length in the middle position, is defined as the intercalary meristem.
It can be defined as the increased growth in plants per unit time.
It can be calculated by taking the change in size and dividing it by the amount of time it has been growing.Q1. What are the key features of NCERT Solutions for Biology Chapter 15 Plant Growth and Development Class 11?
Answer: In NCERT Solutions for Class 11 Biology Chapter 15 you will learn about plant growth generally is indeterminate, growth is measurable, phases of growth, growth rates, conditions for growth, differentiation, dedifferentiation, redifferentiation, development, plant growth regulators, characteristics, physiological effects of plant growth regulators, photoperiodism, and vernalization.
Q2. What are the uses of referring to the NCERT Solutions for Class 11 Biology Chapter 15?
Answer: 1. All the textbook questions are answered in a descriptive manner. 2. Students will be able to solve complex questions effortlessly using the solutions PDF. 3. By regular practice, students can jot down their areas of weakness and work on them for a better score. 4. Diagrams are present under each concept to help students learn them easily.