Question

Hydrilla, Vallisneria are
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Answer 1

Answer:

Hydrophily (they grow in water)

Answer 2

Answer:

Hydrilla verticillata (L.f.) Royle is a major aquatic weed in the southern and eastern US. Once established in a body of water, this exotic invasive species readily dominates and replaces native submersed plants, such as American eelgrass (Vallisneria americana Michx.)