}. That won't compile. You can only use override when the method is virtual in the base class. And once it's virtual in the base class it's virtual in the n-th child too. So you don't have to re-specify virtual when you override a method.
Various vascular tissues in the root allow for transportation of water and nutrients to the rest of theplant.Plant cells have a cell wall to provide support, a large vacuole for storage of minerals, food, andchloroplasts where photosynthesis takes place.
The raw materials of photosynthesis, water and carbon dioxide, enter the cells of the leaf, and the products of photosynthesis, sugar and oxygen, leave the leaf. Water enters the root and is transported up to the leaves through specialized plant cells known as xylem vessels. Land plants must guard against drying out and so have evolved specialized structures known as stomata to allow gas to enter and leave the leaf.