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NCERT solutions for Class 11 Biology chapter 15 - Plant Growth and Development

Biology Textbook for Class 11

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NCERT Biology Class 11

Biology Textbook for Class 11

Chapter 15 - Plant Growth and Development

Pages 253 - 254

Q 1.1 | Page 253

Define growth

Q 1.2 | Page 253

Define differentiation

Q 1.3 | Page 253

Define Development,

Q 1.5 | Page 253

Define Redifferentiation

Q 1.6 | Page 253

Define determinate growth

Q 1.7 | Page 253

Define Growth rate

Q 1.7 | Page 254

Define Meristem

Q 2 | Page 253

Why is not any one parameter good enough to demonstrate growth throughout the life of a flowering plant?

Q 3.1 | Page 253

Describe briefly Arithmetic growth

Q 3.2 | Page 253

Describe briefly Geometric growth

Q 3.3 | Page 253

Describe briefly Sigmoid growth curve

Q 3.4 | Page 253

Define De-differentiation

Q 3.4 | Page 253

Describe briefly Absolute and relative growth rates

Q 4 | Page 253

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.

Q 5 | Page 254

What do you understand by photoperiodism and vernalisation? Describe their significance

Q 6 | Page 254

Why is Abscisic acid also known as stress hormone?

Q 7 | Page 254

Both growth and differentiation in higher plants are open’. Comment.

Q 8 | Page 254

Both a short day plant and a long day plant can flower simultaneously in a given place. Explain.

Q 9 | Page 254

Which one of the plant growth regulators would you use if you are asked to:

(a) Induce rooting in a twig

(b) Quickly ripen a fruit

(c) Delay leaf senescence

(d) Induce growth in axillary buds

(e) Bolt’ a rosette plant

(f) Induce immediate stomatal closure in leaves.

Q 10 | Page 254

Would a defoliated plant respond to photoperiodic cycle? Why?

Q 11 | Page 254

What would be expected to happen if:

(a) GA3 is applied to rice seedlings

(b) Dividing cells stop differentiating

(c) A rotten fruit gets mixed with unripe fruits

(d) You forget to add cytokinin to the culture medium.

NCERT Biology Class 11

Biology Textbook for Class 11

NCERT solutions for Class 11 Biology chapter 15 - Plant Growth and Development

NCERT solutions for Class 11 Biology chapter 15 (Plant Growth and Development) include all questions with solution and detail explanation from Biology Textbook for Class 11. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. has created the CBSE Biology Textbook for Class 11 solutions in a manner that help students grasp basic concepts better and faster.

Further, we at are providing such solutions so that students can prepare for written exams. These NCERT textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Class 11 Biology chapter 15 Plant Growth and Development are Seed Germination, Phases of Growth, Conditions of Growth, Differentiation, Dedifferentiation and Redifferentiation, Concept of Development, Characteristics of Growth Regulators, Seed Dormancy, Vernalisation, Photoperiodism, Introduction of Plant Growth and Development, Tropic Movements in Plants, Plant Growth and Development (Questions), Plant Growth Generally is Indeterminate, Growth Rates, Discovery of Plant Growth Regulators, Physiological Effects of Plant Growth Regulators.

Using NCERT solutions for Class 11 Biology by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in NCERT Solutions are important questions that can be asked in the final exam. Maximum students of CBSE Class 11 prefer NCERT Textbook Solutions to score more in exam.

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