Class 12 · Ecosystem

Trophic Levels & Food Chain — NEET Biology

✅ Asked in NEET 2024
📖 NCERT Source

Organisms occupy a place in the natural surroundings or in a community according to their feeding relationship with other organisms. Based on the source of their nutrition or food, organisms occupy a specific place in the food chain that is known as their trophic level. Producers belong to the first trophic level, herbivores (primary consumer) to the second and carnivores (secondary consumer) to the third.

🖼️Related NCERT figure: A diagrammatic representation showing trophic levels in an ecosystem arranged vertically with arrows pointing upward. The levels are: Producer (First Trophic level/Plants), Primary Consumer (Second trophic level/Herbivore), Secondary Consumer (Third trophic level/Carnivore), and Tertiary Consumer (Fourth Trophic level/Top Carnivore). Each level includes examples of organisms. (Figure 12.2 Diagrammatic representation of trophic levels in an ecosystem)
NCERT Biology · Class 12 · Chapter 12 · Paragraph 25
How NTA Uses This Concept

Trophic levels organize organisms by their feeding position: producers (plants) at level 1, primary consumers (herbivores) at level 2, and secondary consumers (carnivores) at level 3. NTA tests this to check if students understand energy flow through ecosystems. The common mistake is confusing trophic levels with organism types—students might wrongly place an omnivore or think a secondary consumer must be at only one level. Remember: trophic level is determined by what an organism eats in that particular food chain, not by the organism's name. An animal eating plants occupies level 2, even if it also eats meat elsewhere.

Solve This NEET Question

This paragraph was tested 2 times in NEET.

Q1 of 2NEET 2024

(NEET 2024) Match List-I with List-II and choose the correct answer: List I A. Tertiary consumer B. Secondary consumer C. Primary consumer D. Primary producer List II I. Grass II. Lion III. Wolf IV. Goat

Q2 of 2NEET 2020

(NEET 2020) Match the trophic levels with their correct species examples in a grassland ecosystem:- TROPHIC LEVEL A) Fourth trophic level B) Second trophic level C) First trophic level D) Third trophic level SPECIES EXAMPLE (i) Crow (ii) Vulture (iii) Rabbit (iv) Grass

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