A) Oak \[NO_{2}^{-}\]Lantana\[NH_{2}^{-}\]Scirpus\[NH_{2}^{-}\]Pistia\[{{H}_{2}}O\]Hydrilla\[NH_{2}^{-}\]Volvox
B) Volvox\[{{H}_{2}}O\]Hydrilla\[B{{F}_{3}}\]Pistia\[NO_{2}^{-}\]Scirpus\[({{A}_{2}})\] Lantana\[4.4\times {{10}^{-19}}J\]Oak
C) Pistia\[4.0\times {{10}^{-19}}J\]Volvox\[2.0\times {{10}^{-20}}J\]Scirpus\[2.2\times {{10}^{-19}}J\]Hydrilla\[2.0\times {{10}^{-19}}J\] Oak \[4.0\times {{10}^{-20}}J\]Lantana
D) Oak\[{{(C{{H}_{3}})}_{3}}SiCl\]Lantana\[C{{H}_{3}}SiC{{l}_{3}}\]Volvox\[{{(C{{H}_{3}})}_{4}}Si\]Hydrilla\[{{(C{{H}_{3}})}_{2}}SiC{{l}_{2}}\] Pistia\[Al<Ga<In<Tl\]Scirpus
Correct Answer: B
Solution :
| [b] The various stages in a hydrosere are well studied in ponds pools or lakes. The various stages of hydrosere are: |
| (i) Phytoplankton stage eg. Some blue-green algae green algae (Volvox') diatoms and bacteria etc. |
| (ii) Rooted submerged stage eg Hydrilla Vallisneria etc. |
| (iii) Floating stage eg Nelumbo Nymphaea etc. Some free floating species are Pisrio Azolla Lemna etc. |
| (iv) Red-swamp stage eg. Species of Scirpus Typha etc. |
| (v) Sedge-meadow stage eg. Species of Cyperaceae and Gramineae. |
| (vi) Woodland stage eg Lantana Salix Populus etc. |
| (vii) Forest stage eg. Tropical rain forests mixed forests of Almus Acer Quercus (oak) tropical deciduous forests. |
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