Class 9 Science Chapter 12, Patterns in Life: Diversity and Classification, starts from India as a biodiversity hotspot, from the Himalayas to the coral reefs of the Andaman Sea, and asks how such variety evolved and how we sort it. It covers the five kingdoms, invertebrates and vertebrates, adaptations, binomial naming, fossils and threats to biodiversity.
What Class 9 Science Chapter 12 Covers
12.1 to 12.4 Why Classify cover biodiversity, its evolution, how organisms are grouped, and why classification is needed.
12.5 and 12.6 Classification Systems trace systems over time to Whittaker’s five kingdoms: Monera, Protista, Fungi, Plantae and Animalia, including invertebrates without a notochord.
12.7 to 12.10 Beyond the Kingdoms cover adaptations as outcomes of structural change, the binomial system and its rules for writing scientific names, fossils as evidence, and biodiversity under threat.
India as a biodiversity hotspot: India’s mountains, desert, North-East rainforests, plateaus and coasts make it rich in life. The Western Ghats, Indo-Burma, the Himalayas and Sundaland (including the Nicobar Islands) are global hotspots, and the Pakke Tiger Reserve in Arunachal Pradesh alone has nearly 300 of India’s roughly 1,300 bird species. The Indian pitcher plant Nepenthes khasiana and the Sangam-era Tinai classification of landscapes and sacred groves are among the chapter’s examples. Ancient cyanobacteria survive as fossils in stromatolites.
Exercises in Chapter 12
- Revise, Reflect, Refine questions on the five kingdoms and scientific naming.
Read Class 9 Science Chapter 12 Online
More Chapters
- Previous: Chapter 11: Reproduction: How Life Continues
- Next: Chapter 13: Earth as a System: Energy, Matter, and Life
- Hindi medium: Class 9 Science Chapter 12 PDF in Hindi (Anveshan)
- All Science chapters and the other Class 9 books: Class 9 NCERT books 2026-27
FAQ
What are the five kingdoms in Class 9 Science?
Monera (unicellular prokaryotes), Protista (unicellular eukaryotes), Fungi, Plantae and Animalia.
What are the rules for writing scientific names?
The genus name comes first with a capital letter, the species name second in small letters, and the whole name is italicised when printed or underlined when handwritten.
Which regions of India are global biodiversity hotspots?
The Western Ghats, Indo-Burma (including North-East India), the Himalayas and Sundaland (including the Nicobar Islands).