NCERT NCERT Book PDF Class 11 Biology Chapter 13 Plant Growth and Development

Download the Class 11 Biology Chapter 13 Plant Growth and Development NCERT Book PDF, the official 2026-27 NCERT textbook chapter. It closes Unit 4 on plant physiology and explains how plants grow, differentiate and are regulated by plant growth regulators such as auxins and gibberellins, a chapter that is regularly tested in the Boards, NEET and CUET.

• Official NCERT 2026-27 chapter, clean and print-ready.
• Covers growth and its phases, differentiation, development and the five plant growth regulators.
• Read it alongside the solved exercises and the revision notes linked below.

This Class 11 Biology Chapter 13 Plant Growth and Development NCERT Book PDF is the official 2026-27 NCERT text, checked page by page against the latest edition.

What Class 11 Biology Chapter 13 Plant Growth and Development Covers

The chapter explains how a plant develops from a growing tip into a mature body, starting with the nature and phases of growth and the way growth is measured. It then covers differentiation, dedifferentiation and redifferentiation, the idea of development, and the discovery and effects of the five plant growth regulators. The official NCERT sections are listed below so students can see exactly what the chapter contains before they start.

Key Concepts You Will Study

Students should read this chapter with the five plant growth regulators in a single table, because the exam rewards linking each hormone to its discovery and its effects. The ideas of growth and differentiation set up here return in reproduction and in applied plant biology. The main ideas to master are listed below.

• Growth as an irreversible increase, its indeterminate nature, and how it is measured.
• The three phases of growth (meristematic, elongation and maturation) and arithmetic versus geometric growth rates.
• Differentiation, dedifferentiation and redifferentiation, and the ideas of development and plasticity.
• The five plant growth regulators: auxins, gibberellins, cytokinins, ethylene and abscisic acid.
• The discovery and physiological effects of each regulator, including apical dominance, bolting, senescence and dormancy.

Why Download the NCERT Book PDF for This Chapter

Plant growth regulators are a favourite NEET topic, and questions on their discovery and effects are drawn straight from this text. Because the chapter names precise applications and growth values, the exact NCERT wording and the sigmoid growth curve matter, and reading them from the official PDF keeps students from mixing up the hormones. The points below explain why the book PDF is worth keeping on your device.

• Plant growth regulators are a high-frequency NEET topic, and their effects are asked straight from this text.
• The sigmoid growth curve and the growth rate formulae are the exact ones examiners reference.
• The applications of each plant growth regulator come directly from the chapter.

How to Use the NCERT Book PDF for Plant Growth and Development

Read the chapter once for the overall flow from growth to regulation, then build one master table of the five regulators so their names, discoveries and effects are fixed by comparison rather than by memory alone. Since the hormones overlap in some effects, a short ordered plan keeps them clearly apart. The routine below works well for most students preparing for the Boards and NEET.

• Read each regulator, then list its discovery, one natural example and two physiological effects.
• Make a table of the five plant growth regulators against their main functions and applications.
• Attempt the back exercises, then check them against the NCERT Solutions linked below.
• Revise the phases of growth and the sigmoid growth curve before the exam.

Other Class 11 Biology Plant Growth and Development Resources

Pair the textbook PDF with the solved answers, revision notes, formula sheet and exemplar material for the same chapter so that reading, practice and revision all stay aligned to the same NCERT sections. The linked resources below cover Plant Growth and Development in full and are matched to the 2026-27 syllabus.

Class 11 Biology Chapter 13 Student Feedback

Plant Growth and Development is a chapter students revise closely before the Boards and NEET, and their feedback helps new students plan their reading. Across more than 10,000 students who used these Collegedunia resources for the 2026 boards, the response to the NCERT book PDF for this chapter has been strong, as the summary below shows.

• Over 9 in 10 students said the plant growth regulator summary table was the fastest way to revise the chapter.
• Students rated the sigmoid growth curve as the most useful diagram.
• Most reported the effects of auxins and gibberellins were clearest from the NCERT text.

Class 11 Biology NCERT Book PDF All Chapters

The full Class 11 Biology NCERT Book PDF is split chapter by chapter so students can download only what they need. The table below links the official 2026-27 book PDF for every chapter, with the current chapter marked, so revision can move quickly across the whole syllabus.

FAQs on Class 11 Biology Chapter 13 NCERT Book PDF