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
735
Ecosystem Structure and Function
637
Ecological Succession
593
productivity
486
Nutrient Cycling
484
Ecological Pyramids
383
Energy Flow
329
Ecosystem Services
23
Productivity And Decomposition Of Ecosystem
11
Ecological Sucession
4
Productivity Gpp Npp And Secondary
1
Pyramids
1
Food Chain
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.