Sexual Reproduction in Flowering Plants

A. Flowers of $Vallisneria$ are not colourful and do not produce nectar – incorrect. B. Flowers of water lily emerge above the water level and are pollinated by insects or wind, not by water – correct. C. In most water-pollinated species, pollen grains are protected from wetting by a mucilaginous covering – correct. D. Pollen grains of some hydrophytes (e.g. seagrasses) are long and ribbon-like – correct. E. In some hydrophytes such as $Vallisneria$, pollen grains are carried passively inside water – correct. So B, C, D and E only are correct.

The figure shows a wind-pollinated plant inflorescence (e.g. maize/grass). Wind-pollinated flowers have well-exposed stamens so that pollen is easily dispersed by wind, and large, feathery stigmas to trap air-borne pollen.