Multiple choice Which of the following tissues helps in the floating of hydrophytes? Parenchyma Aerenchyma Chlorenchyma Prosenchyma Reveal answer Fill a bubble to check yourself B Correct answer Explanation In aquatic plants, parenchyma cells have star like air cavities in between the cells. They are called aerenchyma. The air trapped in the cavities make the plants lighter in weight and help them to float in water.