NTA Abhyas NEET2020BotanyEcosystemPractice
The correct sequence of plants in a hydrosere is
Options
- AOak → Lantana → Scirpus → Pistia → Hydrilla → Volvox
- BVolvox → Hydrilla → Pistia → Scirpus → Lantana → Oak
- CPistia → Volvox → Scirpus → Hydrilla → Oak → Lantana
- DOak → Lantana → Volvox → Hydrilla → Pistia → Scirpus
Correct answer
B. Volvox → Hydrilla → Pistia → Scirpus → Lantana → Oak
Step-by-step solution
The various stages in a hydrosere are well studied in ponds, pools or lakes. The various stages of hydrosere are : (i) Phytoplankton stage, e.g., Some blue-green algae, green algae (Volvox), diatoms and bacteria, etc. (ii)Rooted submerged stage, e.g., Hydrilla, Vallisneria, etc. (iii) Floating stage, e.g., Nelumbo, Nymphaea, etc. Some free floating species are Pistia, Azolla, Lemna, etc. (iv) Red-swamp stage, e.g., Species of Scirpus, Typha, etc. (v) Sedge-meadow stage, e.g., Species of Cyperaeae and Gramineae. (vi