A) Eicchornia
B) Potamogeton
C) Sagittaria
D) Nymphaea
Correct Answer: D
Solution :
The fruit of Nymphaea is a spongy berry, which dehisces by the swelling of mucilage surrounding the seeds. The seeds thus set free float as spongy aril entangles air bubbles. They settle down to the bottom of ponds as aril decays.
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