Question

Match List - I with List - II:

	List - I		List - II
(A)	Detritus food chain	(I)	Available biomass for consumption
(B)	Standing state	(II)	Dead organic matter
(C)	Standing crop	(III)	Amount of nutrients in soil
(D)	Net Primary Productivity	(IV)	Mass of living material

Choose the correct answer from the options given below :

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

Answer 1

The Correct Option is D

1. DETRITUS FOOD CHAIN:

•  This type of food chain originates from dead organic matter.
• Organic matter like dead animals, birds, insects, fallen leaves, rotten vegetables, etc. is decomposed by microorganisms like bacteria, fungi, etc.
• These decomposed materials are then consumed by detrivores like earthworms and maggots
• They are further consumed by small birds and the food chain continues.

2. STANDING STATE: It refers to the amount of inorganic or non-living substances currently present within an ecosystem.

• It means the number of nutrients present in the soil at any given time in the form of inorganic material, which occurs to increase and decrease depending on the balance created by living & non-living (biotic & abiotic) components of that ecosystem.

3. STANDING CROP: It refers to the total amount of organic mass in each tropic level available for consumption by consumers.

4. NET PRIMARY PRODUCTIVITY: It is the amount of biomass or energy made available to consumers by plants and primary producers in an ecosystem at a specific time.

So, the correct option is (D): (A)-(II), (B)-(III), (C)-(IV), (D)-(I)