The new plants planted in an area where they have never been planted before are called introduced species. They can greatly affect local ecosystem. <span>In the new area, they have no natural predators and are able to spread. </span>If they spread beyond the area they are planted, they become invasive species which can overgrow native biotopes and are a great threat to the local biodiversity. This could lead to the extinction of some native species.
The anthers are in the elevated position so that the pollinators will be attracted towards it, and that the pollen grains are easily carried away by the agents of pollination.
