Match List-I with List-II
| List-I Terms | List-II Features |
|---|---|
| (A). Humus | (I). Photosynthetically active radiation |
| (B). PAR | (II). Biomass at a particular time |
| (C). Trophic level | (III). Dark-colored amorphous substance |
| (D). Standing crop | (IV). Nutrition based-specific place in the food chain |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → (A)-(III), (B)-(I), (C)-(IV), (D)-(II)
(A) Humus — this matches (III) Dark-colored amorphous substance. Humus forms from detritus by humification. It is dark and has no fixed shape. It resists microbes, so it breaks down very slowly and stores nutrients in the soil.
(B) PAR — this matches (I) Photosynthetically active radiation. PAR is the part of sunlight that plants can use for photosynthesis. It is less than half of the sunlight that falls on the earth.
(C) Trophic level — this matches (IV) Nutrition based-specific place in the food chain. Organisms take a place in the food chain according to how they get food: producers first, herbivores second, carnivores third.
(D) Standing crop — this matches (II) Biomass at a particular time. The standing crop is the mass of living material at a trophic level at a particular time. It is measured as biomass, so it is the biomass present at that time.