NEET · Class 12 Biology
Ecosystem MCQs for NEET
Ecology gives some of the easiest marks in NEET, and this chapter is mostly numbers and definitions. Answer these questions, then take the full chapter test in the app so the facts stay fresh.
Take the free 10-question testFree PDF revision sheet — Ecosystem
One printable page-set with the NCERT recap, exam tips and all 4 questions with answers and reasons. Free to share and print.
Practice questions on Ecosystem
Q1. According to Lindeman's 10% law, the energy transferred to the next trophic level is about:
Q2. Which ecological pyramid is always upright?
Q3. Net primary productivity is equal to:
Q4. The phosphorus cycle differs from the carbon cycle because it:
Quick NCERT recap
- Only about 10% of energy passes to the next trophic level (Lindeman's 10% law).
- Gross primary productivity minus respiration equals net primary productivity.
- The pyramid of energy is always upright; pyramids of number and biomass can be inverted.
- Decomposition steps: fragmentation, leaching, catabolism, humification and mineralisation.
- Ecological succession ends in a stable climax community.
Exam tips for this chapter
- Memorise the pyramid exceptions — a tree ecosystem for number, a sea ecosystem for biomass.
- Learn the productivity numbers of the earth's ecosystems from the NCERT table.
- Know which nutrient cycle is gaseous (carbon, nitrogen) and which is sedimentary (phosphorus).
Common questions
How many marks does ecology carry in NEET?
Ecology and environment usually account for a large share of Class 12 Biology questions, and they are among the easiest to score.
Do I need coaching notes for this chapter?
No. NCERT plus repeated question practice is enough, which is what the daily test in the app gives you.