In Conclusion...

The three groups of angiosperm, hydrophytes, mesophytes and xerophytes, all have adaptations that give them the ability to survive in their habitats. Each of the habitats have limiting factors, but because of the plant's adaptations, they are able to survive in their varying conditions. 

Water is essential for plants to sustain life as their cells need it to complete various life processes. Without water, plants wouldn't be able to produce glucose, the sugar they convert into energy. Without energy, plant cells couldn't function and the plant would die. 

All types of angiosperm have to balance the water in their cells to ensure they survive. As their habitats have varying amounts of water available for the plant, many plants adaptations are specific to dealing with water conservation. These adaptations allow the different plants to survive in their habitats; if they didn't have the adaptations, the plants wouldn't be able to manage their water supplies and would most likely die. Their adaptations allow the plants to survive, despite the limiting factors of their ecological niches.