Question

Match List-I with List-II:

List-I (Concepts)	List-II (Explanation)
(A) Standing state	(IV) Amount of mineral nutrients in the soil at a given time
(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	(I) Available biomass for the consumption of heterotrophs

Choose the correct answer from the options given below:

• (A) - (IV), (B) - (III), (C) - (II), (D) - (I)
• (A) - (II), (B) - (I), (C) - (III), (D) - (IV)
• (A) - (IV), (B) - (II), (C) - (III), (D) - (I)
• (A) - (IV), (B) - (I), (C) - (III), (D) - (II)

Answer 1

The Correct Option is C

To solve this problem, we need to accurately match each concept in List-I with its corresponding explanation in List-II. Let's carefully analyze each item:

List-I (Concepts)	List-II (Explanation)
(A) Standing state	(IV) Amount of mineral nutrients in the soil at a given time
(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	(I) Available biomass for the consumption of heterotrophs

1. (A) Standing state: This refers to the total amount of nutrients in the soil, matching with (IV).
2. (B) Secondary productivity: Describes the rate at which consumers (heterotrophs) form organic matter, aligning with (II).
3. (C) Standing crop: Measures the mass of living organisms within a particular trophic level at a specific time, corresponding with (III).
4. (D) Net primary productivity: Represents the amount of biomass available for consumption by heterotrophs, fitting with (I).

After matching each concept with its correct explanation, the valid alignment is:  (A) - (IV), (B) - (II), (C) - (III), (D) - (I).

Answer 2

(A) Standing state

The standing state refers to the amount of mineral nutrients in the soil at a given time. This is a measure of the available nutrients that can be used by plants and other organisms. Matching Explanation: (IV) Amount of mineral nutrients in the soil at a given time.

(B) Secondary productivity

Secondary productivity is the rate of formation of organic matter by consumers. This includes the growth and reproduction of animals and other heterotrophs. Matching Explanation: (II) Rate of formation of organic matter by consumers.

(C) Standing crop

The standing crop refers to the mass of living matter in a trophic level at a given time. This includes the biomass of plants, animals, or other organisms at a specific trophic level. Matching Explanation: (III) Mass of living matter in a trophic level at a given time.

(D) Net primary productivity

Net primary productivity (NPP) is the amount of organic matter produced by producers (such as plants) that is available for consumption by heterotrophs. It represents the net gain in biomass after accounting for respiration losses. Matching Explanation: (I) Available biomass for the consumption of heterotrophs.

Conclusion

Based on the explanations above, the correct matching is:

• (A) - (IV)
• (B) - (II)
• (C) - (III)
• (D) - (I)

Therefore, the correct answer is (3) (A) - (IV), (B) - (II), (C) - (III), (D) - (I).