Question

how do plant like water lilies float on water

Answer 1

Water lilies have waxy bowl shaped flower to float on water and have coloured flower to attract insects therefore in spite of being an aquatic plant its pollination is entomophilous.

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Answer 2

Water lilies are well equipped for life in the water, with a stem structure that contains a tough network of bundled hollow cells that hold air and help stems float. Once leaves unfurl, their large surface area offers the plant additional support by using water surface tension to keep the plant afloat.