KCET · BIOLOGY · STD 12 - 12. Ecosystem

Match Column-I with Column -II. Select the option with correct combination.
Column-I Column-II
1. Standing state p. Mass of living material at a given time
2. Pioneer species q. Amount of nutrients in the soil at a given time.
3. Detritivores r. Species that invade a bare area
4. Standing crop s. Breakdown detritus into smaller particles

A 1-p, 2-s, 3-r, 4-q
B 1-q, 2-r, 3-p, 4-s
C 1-p, 2-r, 3-s, 4-q
D 1-q, 2-r, 3-s, 4-p

Verified Solution

Answer & Solution

Correct Answer

(D) 1-q, 2-r, 3-s, 4-p

Step-by-step Solution

Detailed explanation

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

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From KCET

List-I	List-II
(a) Net flux through \(S_1\)	(i) \(\dfrac{-2Q}{\varepsilon_0}\)
(b) Net flux through \(S_2\)	(ii) \(\dfrac{-Q}{\varepsilon_0}\)
(c) Net flux through \(S_3\)	(iii) Zero

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Column-I	Column-II
1. Standing state	p. Mass of living material at a given time
2. Pioneer species	q. Amount of nutrients in the soil at a given time.
3. Detritivores	r. Species that invade a bare area
4. Standing crop	s. Breakdown detritus into smaller particles