Class 12 · Biology
Ecosystem
NEET questions.
Build recall through active solving with original NEET-style MCQs, worked explanations and chapter-level NCERT provenance.
250 verified questions · NCERT chapter mapped · automatic error log
BiologyPlate 41
NeetVellum atlas · fig. biology
41
Question preview
Three examples from the live 250-question bank. Answers appear after attempting them in practice mode.
Example 1 · difficulty 1/5
In an ecosystem, the rate of formation of new organic matter by consumers is called:
- A. Gross primary productivity
- B. Net primary productivity
- C. Secondary productivity
- D. Standing crop
Example 2 · difficulty 2/5
In a grassland ecosystem, the gross primary productivity is 700 g m⁻² yr⁻¹ and the producers lose 250 g m⁻² yr⁻¹ through respiration. The net primary productivity of this ecosystem is:
- A. 950 g m⁻² yr⁻¹
- B. 450 g m⁻² yr⁻¹
- C. 280 g m⁻² yr⁻¹
- D. 1750 g m⁻² yr⁻¹
Example 3 · difficulty 1/5
On a completely bare rock surface undergoing primary succession, the organisms that appear FIRST and begin the process of soil formation are:
- A. Lichens
- B. Mosses
- C. Herbaceous plants
- D. Small shrubs
The chapter mastery loop
- 1. Attempt firstExpose recall gaps before rereading.
- 2. Classify the missConcept, careless, rushed or guessed.
- 3. Re-practiceReturn until the error pattern disappears.
Frequently asked questions
How many Ecosystem NEET questions are available?
NeetVellum publishes 250 verified questions for this chapter. Free accounts use the daily UG quota; UG Pro removes it.
How should I revise Ecosystem for NEET?
Attempt questions before rereading, classify each miss, revisit the exposed NCERT concept, then re-practice until the error pattern disappears.