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Biology · Class 12EcosystemVideo coming soonRead the notes instead
Free notes for this chapterMark as Completed
Structure and Function, Productivity and Decomposition, Energy Flow and the board questions built on them — roughly 5 marks of the paper.
What this chapter covers
- 1Structure and Function
- 2Productivity and Decomposition
- 3Energy Flow
- 4Ecological Pyramids
- 5Nutrient Cycling
These lessons are being recorded. The written notes for this chapter are free to download now.
Learning resources
Seedha Notes
Chapter notes withimportant points,examples & format
View Notes for Ecosystem, BiologyPractice Questions
Important questions,board questions,numericals
Practice Now for Ecosystem, BiologyPrevious yearquestions withfull solutions
View PYQs for Ecosystem, BiologySample Paper
Board patternsample paper withmarking scheme
Open Paper for Ecosystem, Biology
In the notes
Topics covered
- 01Structure and Function20:25
- 02Productivity and Decomposition31:08
- 03Energy Flow23:37
- 04Ecological Pyramids21:35
- 05Nutrient Cycling22:27
After this chapter you can
- Explain structure and function without reading from the book
- Present productivity and decomposition in the format the marking scheme rewards
- Attempt every previous year question set on this chapter
- Marks
- 5
- PYQs
- 23
- Video
- 1h 59m
Then do the work
- One-shot revision, 30 minutes
- Formula sheet for this chapter
- Printable summary, 2 pages
Prepare
| Year | Asked as | Marks |
|---|---|---|
| 2025 | Case based | 4 |
| 2024 | MCQ set | 6 |
| 2023 | Long answer | 4 |
| 2022 | Short answer | 6 |
| 2021 | Case based | 6 |
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