Skip to main content
Super TutorResources
Chapter 22 of 41
Syllabus

Principles of Ecology — Syllabus

Telangana Open School (TOSS) · Class 12 · Biology

What Principles of Ecology covers in Telangana Open School (TOSS) Class 12 Biology: 4 topics, for the 2026-27 session.

44 questions35 flashcards5 concepts

Interactive on Super Tutor

Studying Principles of Ecology? Get the full interactive chapter.

Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for syllabus and more.

Try Super Tutor — Free

Free trial, no card needed.

4 Topics · Telangana Open School (TOSS) Class 12 Biology · 2026-27

Topics in Principles of Ecology

1

Environment and Levels of Organization

  • The environment includes all physical, chemical, and biological factors surrounding an organism.
  • It is divided into abiotic (non-living) and biotic (living) components.
  • Levels of organization: Genes → Cells → Organs → Organism → Population → Community → Ecosystem.
2

Ecosystem Structure and Function

  • An ecosystem includes biotic components (producers, consumers, decomposers) and abiotic components (light, temperature, water, minerals).
  • Producers (autotrophs) make their own food using sunlight; plants are examples.
  • Consumers (heterotrophs) depend on others for food – herbivores, carnivores, omnivores.
3

Food Chain and Food Web

  • A food chain shows the linear transfer of energy from one organism to another through feeding relationships.
  • Trophic levels: 1st – Producers, 2nd – Primary consumers (herbivores), 3rd – Secondary consumers (carnivores), 4th – Tertiary consumers.
  • Food webs show interconnected food chains, reflecting real-world complexity.
4

Energy Flow and Ecological Pyramids

  • Energy enters ecosystems via sunlight and is captured by producers through photosynthesis.
  • Only about 10% of energy is transferred from one trophic level to the next – known as the 10% law.
  • Energy flow is unidirectional and non-cyclic – once used, it is lost as heat.

Key Concepts

Central concept: Ecology

EnvironmentLevels of OrganizationEcosystemFood Chain and Food WebEnergy FlowNutrient CyclesBiosphere

Work through every topic in Principles of Ecology with notes and quizzes

Start This Chapter

Frequently Asked Questions

What are the important topics in Principles of Ecology for Telangana Open School (TOSS) Class 12 Biology?
Key topics in Principles of Ecology include Environment and Levels of Organization, Ecosystem Structure and Function, Food Chain and Food Web, Energy Flow and Ecological Pyramids. Study these first, then practise questions on each for the Telangana Open School (TOSS) Class 12 board exam.
How should I revise Principles of Ecology for the Telangana Open School (TOSS) Class 12 board exam?
Learn the core ideas first, then work through the 44 practice questions on Principles of Ecology. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

More resources for Principles of Ecology

All Telangana Open School (TOSS) Class 12 Biology Syllabus

For serious students

Get the full Principles of Ecology chapter — start free.

Quizzes, flashcards, an AI doubt solver and a study plan for Telangana Open School (TOSS) Class 12 Biology. Free to start, no card needed.

Try Super Tutor Free
Try this chapter free