Question

what are the adaptation of hydrophyte plants. require best answer.​

Answer 1

Answer:

Vascular plants inheriting from remote marine ancestors a multicellular body with unlimited apical growth and a dimorphic life cycle slowly conquered the land and spread themselves over much of the land surface. Yet, despite this flourishing con­quest of the land, some angiosperms, most of them herbs and a few pteridophytes, ven­tured back into fresh-waters and even further,’ to their ancestral habitat, the oceans.

They carried with them the relics of their terrestrial heritage and the advanced repro­ductive methods of their terrestrial relatives which, to say the least, seem – more of an anachronistic obstacle to them now—for from whatever depth at which they grow, most angiospermic hydrophytes still aim at raising their flowers above the surface of water for wind or insect pollination.

Explanation:

Hydrophytes are plants normally growing in water and also include plants inhabit­ing swampy or marshy habitats containing a quantity of water which would prove much more than optimal for the average land plant. It will be evident that hydrophytes are subject to less extremes of temperature than land plants for the watery habitat in which the plants grow certainly takes longer to be heated and also longer to cool.

Con­ditions thus are more uniform compared to plants growing in soil and as a result, many of the hydrophytes are very widely distributed geographically. Submerged aquatics, because they are screened from too high intensities of light show many of the charac­teristics of shade plants, sciophytes.

Habitat water per se is not harmful but because of extremely low solubility of oxygen in water or in water-saturated soils, (oxygen readily dissolves in water when the surface is in contact with air but subsequent diffusion down­wards is so slow that a permanent oxygen deficiency exists all the time for submerged hydrophytes; on the other hand the availability of CO2 in water for photosynthesis in submerged plants is certainly as much or even somewhat more, compared to land plants; at 20°C, one litre of water can hold 0.3 ml of CO2) a complex of critical environ­mental conditions is produced and only specialised forms of plants can suitably cope with it.

The upper sunlit zone of the sea where the light intensity is great enough to permit photosynthesis, is referred to as euphotic zone, usually regarded as being to a depth of a hundred metres, though there might be differences depending on such factor as the amount of solid carried in suspension. River estuary obviously is less transparent than the mid-oceans.

Answer 2

Answer:

In biology, an adaptation is a form of change that is maintained by the natural selection process. Adaptations allow an organism to be better suited to its present conditions and more likely to reproduce or reproduce more successfully.

Hydrophytes are plants that have adapted to life in very wet places. So much so that they only live on or in water itself. You can remember hydrophytes for the 'hydro-' part of their name, meaning 'water.' Hydrophytes like the water lily have little to no root system, unlike land plants, because roots simply aren't as necessary since water is so readily available.

Most leaves in hydrophytes are thin, and many can float freely. The part of plants that allow for gas exchange, called the stomata, are located only on the part of the plant surface that's exposed to air. Finally, underwater plants will often lack stomata since they no longer need to exchange gases with the atmosphere anymore. They instead exchange gases with the water they live in.