Question of 29
Q.Rooted plant with floating leaves is:
(a) Vallisneria
(b) Victoria regia
(c) Sagittaria
(d) Hydrilla
Tamil Nadu DgeTamil Nadu HSC First Year (DGE) Board 2018MCQ· 1mImportance★★★★★est
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Start your 14-day free trial to unlock the full solution →Victoria regia is rooted in the substrate underwater while its leaves float on the surface, distinguishing it from wholly submerged hydrophytes.
Hydrophytes (water plants) are grouped by how much of the plant is exposed to air versus water:
- Rooted with floating leaves: the plant is anchored in the mud, but the leaves float on the water surface (e.g. Victoria regia, Nymphaea/water lily) - large, flat leaves with a waxy upper surface and stomata concentrated on the upper epidermis.
- Wholly (completely) submerged and rooted: the entire plant remains below the water surface, anchored in the substrate (e.g. Vallisneria, Hydrilla) - typically with ribbon-like or finely dissected leaves and no functional stomata. …
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