Ecosystem — NEET/JEE Questions, Notes & Weightage
Class 12 Ecology and Environment NEET weightage: High 4,076 questions
Covers energy flow (10% law), food chains/webs, ecological pyramids, nutrient cycling (carbon, phosphorus), and ecosystem types. The 10% energy-transfer law and pyramid-of-numbers/biomass questions are this chapter's most reliable NEET contributions.
Practice all 4,076 Ecosystem questions →Topics inside Ecosystem
decomposition
656
Ecosystem Structure and Function
646
Ecological Succession
583
productivity
495
Nutrient Cycling
462
Ecological Pyramids
376
Energy Flow
211
Productivity And Decomposition Of Ecosystem
13
Ecological Sucession
4
Productivity Gpp Npp And Secondary
1
Food Chain
1
Tropic Level
1
Frequently asked questions
What is the most-tested numerical concept in Ecosystem?
The 10% law of energy transfer between trophic levels, and calculating energy/biomass available at a given trophic level from it, is the chapter's signature numerical question type.
Are ecological pyramids (number, biomass, energy) tested individually?
Yes — including the exception cases (e.g. an inverted pyramid of numbers in a tree ecosystem) which NEET specifically likes to test as conceptual traps.
Is the carbon cycle tested in more detail than other nutrient cycles?
Yes, generally — the carbon cycle (and to a lesser extent phosphorus) gets more direct attention than other biogeochemical cycles in past NEET papers.