Question

Write two adaptions of aquatic plants.

Answer 1

Adaptions found in Hydrophytes: The adaptions are as follows:
(1) Hydrophytes show the low osmotic concentration of cell sap. Osmotic concentration of cell sap is equal or slightly higher than that of the habitat water.
(2) Some hydrophytes (water stomata) in floating hydrophytes which reduces the excessive amounts of water present in the plant body of the hydrophyte.
(3) The gasses are exchanged from water through surface cells. Some $C{O}_2$ evolved during respiration is stored in the air spaces which is consumed during photosynthesis and $O_2$ evolved in photosynthesis is used in respiration.
(4) The mucilaginous secretion of mucilage cells and mucilage canals around the body of the hydrophytes provides protection against friction, desiccation, decaying and microbial injuries.
(5) Flowering and fruiting are comparatively poor. They are adapted more for vegetative propagation.