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NIOS Class 11Subject library

NIOS Class 11 Biology

Chapter-wise notes, previous year papers, sample papers and Q&A for NIOS Class 11 biology — free, syllabus-aligned, exam-ready.

15 chapters~225 min read totalFree · printable

Chapters

15 chapters — sequenced for revision and exam prep.

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NCERT chapters — we haven't confirmed NIOS's prescribed textbook

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The Living World

What defines life — characteristics of living organisms, taxonomy, taxonomic categories, binomial nomenclature, and the five-kingdom classification. CBSE Class 11 Biology Chapter 1.

CBSE⏱ 15 minRead chapter

Biological Classification

The five-kingdom classification in detail — Monera, Protista, Fungi, Plantae, Animalia — along with viruses, viroids, and lichens. CBSE Class 11 Biology Chapter 2.

CBSE⏱ 15 minRead chapter

Plant Kingdom

The diversity of plants — algae, bryophytes, pteridophytes, gymnosperms, and angiosperms — with emphasis on life cycles and alternation of generations. CBSE Class 11 Biology Chapter 3.

CBSE⏱ 15 minRead chapter

Animal Kingdom

The diversity of animals — classification from Porifera to Chordates, with emphasis on body organisation, symmetry, coelom, and key characteristics of each phylum. CBSE Class 11 Biology Chapter 4.

CBSE⏱ 15 minRead chapter

Morphology of Flowering Plants

The external structure of flowering plants — root, stem, leaf, inflorescence, flower, fruit, and seed — with emphasis on modifications and adaptations. CBSE Class 11 Biology Chapter 5.

CBSE⏱ 15 minRead chapter

Anatomy of Flowering Plants

The internal structure of flowering plants — plant tissues, tissue systems, root and stem anatomy, leaf anatomy, and secondary growth. CBSE Class 11 Biology Chapter 6.

CBSE⏱ 15 minRead chapter

Structural Organisation in Animals

The organisation of animal bodies — epithelial, connective, muscular, and nervous tissues — along with the morphology and anatomy of the cockroach. CBSE Class 11 Biology Chapter 7.

CBSE⏱ 15 minRead chapter

Cell — The Unit of Life

The fundamental unit of life — cell theory, prokaryotic and eukaryotic cells, cell organelles, membranes, and cytoskeleton. CBSE Class 11 Biology Chapter 8.

CBSE⏱ 15 minRead chapter

Biomolecules

The chemical building blocks of life — carbohydrates, lipids, proteins, nucleic acids, and enzymes — their structure, function, and importance. CBSE Class 11 Biology Chapter 9.

CBSE⏱ 15 minRead chapter

Cell Cycle and Cell Division

The sequence of events by which cells replicate — interphase, mitosis, meiosis, their stages and significance. CBSE Class 11 Biology Chapter 10.

CBSE⏱ 15 minRead chapter

Plant Physiology — Transport

How plants move water, minerals, and food — diffusion, osmosis, plasmolysis, transpiration, xylem and phloem transport mechanisms. CBSE Class 11 Biology Chapter 11.

CBSE⏱ 15 minRead chapter

Mineral Nutrition

Essential mineral elements for plants, their functions, deficiency symptoms, and the nitrogen cycle — including biological nitrogen fixation. CBSE Class 11 Biology Chapter 12.

CBSE⏱ 15 minRead chapter

Photosynthesis in Higher Plants

The process by which plants convert light energy into chemical energy — light reactions, Calvin cycle, C3 and C4 pathways, and photorespiration. CBSE Class 11 Biology Chapter 13.

CBSE⏱ 15 minRead chapter

Respiration in Plants

The process by which plants break down organic compounds to release energy — glycolysis, Krebs cycle, electron transport system, aerobic and anaerobic respiration. CBSE Class 11 Biology Chapter 14.

CBSE⏱ 15 minRead chapter

Plant Growth and Development

The processes by which plants grow and develop — phases of growth, growth rates, plant growth regulators (phytohormones), photoperiodism, and vernalisation. CBSE Class 11 Biology Chapter 15.

CBSE⏱ 15 minRead chapter

Biology resources for Class 11

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