Match List-I with List-II:
| List-I | List-II |
|---|---|
| Concepts | Explanation |
| (A) Standing state | (I) Available biomass for the consumption of heterotrophs |
| (B) Secondary productivity | (II) Rate of formation of organic matter by consumers |
| (C) Standing crop | (III) Mass of living matter in a trophic level at a given time |
| (D) Net primary productivity | (IV) Amount of mineral nutrients in the soil at a given time |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → (A)-(IV), (B)-(II), (C)-(III), (D)-(I)
(A) Standing state — this matches (IV) Amount of mineral nutrients in the soil at a given time. The nutrients such as carbon, nitrogen, phosphorus and calcium present in the soil at any given time make up the standing state. It is a measure of nutrients, not of living matter.
(B) Secondary productivity — this matches (II) Rate of formation of organic matter by consumers. Primary productivity is the work of the producers. Secondary productivity is the rate at which consumers form new organic matter from the food they eat.
(C) Standing crop — this matches (III) Mass of living matter in a trophic level at a given time. Each trophic level has a certain mass of living material at a particular time. It is measured as the biomass or the number of organisms per unit area.
(D) Net primary productivity — this matches (I) Available biomass for the consumption of heterotrophs. NPP is gross primary productivity minus what the plants use up in respiration. What remains is available to the herbivores and decomposers.
Note: A similar question was also asked in CUET (UG) 2022 on 23-08-2022 (Slot 3).