1. | Standing state | 2. | Standing crop |
3. | Humus | 4. | Detritus |
List - I | List - II | ||
(A) | Hydrarch succession | (I) | Gradual change in the species composition |
(B) | Xerarch succession | (II) | Faster and climax reached quickly |
(C) | Ecological succession | (III) | Lichens to mesic conditions |
(D) | Secondary succession | (IV) | Phytoplankton to mesic conditions |
Options: | (A) | (B) | (C) | (D) |
1. | IV | II | III | I |
2. | III | I | IV | II |
3. | I | IV | II | III |
4. | IV | III | I | II |
List-I | List-II | ||
(a) | Carbon dissolved in oceans | (i) | 55 billion tons |
(b) | Annual fixation of carbon through photosynthesis | (ii) | 71% |
(c) | PAR captured by plants | (iii) | \(4 \times 10^3 \)kg |
(d) | Productivity of oceans | (iv) | 2 to 10% |
(a) | (b) | (c) | (d) | |
1. | (ii) | (iv) | (iii) | (i) |
2. | (iii) | (iv) | (ii) | (i) |
3. | (ii) | (iii) | (iv) | (i) |
4. | (iii) | (ii) | (i) | (iv) |