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Write the adaptationin aqatic plants due to which

1. submerged leaves can bend in the flowing water

2. leaves can float on the surface of water

1. There is no strengthening tissue present in the stems or leaves. Thus the stems that holding the leaves can easily bend in the flow of water. Due to the presence of air pockets inside some of the stems of aquatic plants they remain erect. 

 

2. The leaves of the aquatic plants float on the surface of water to absorb as much sunlight as they can for photosynthesis. The stems and leaves contain air sacs inside the tissues which help them to reduce weight and float on the surface. 

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  •  Some acquatic plants are totally submerged in water and the part of such plants grow under water. All parts of such plants grow under water.
  • The roots are much reduced in size and their main function is to hold the plant in place.
  • The stems of these plants are long , hollow and light.
  • The stems grow up to the surface of the water while the leaves and flowers , float on the surface of the water . Eg water Hyacinth.
  • Some other acquatic plants have narrow and thin ribbon like leaves.  These can bend in the flowing water.  These leaves can bend in the flowing water.  Such leaves are highly divided , through which water can easily flow without damaging them.
  • In some other cases, like the lotus  , require much sunlight.  Their leaves are wide and disc shaped.  Their stem and leaves have a waxy coating .  This coating help the leaves and stem from getting wet , so they float on the surface of the water.

Hope u understood the concept....

Cheers......

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