Provide commercial/recreational opportunities without adversely impacting wild populations (i.e. overharvest).
Both asexually and sexually
Plasmolysis is the reason. The reason that the Elodea cell prevents from collapsing completely is that the Plasmolysis is the main reason because it always has water to keep it full. The answer in this question is Plasmolysis is the reason because it always has water to keep it full.
Weathering is wearing down objects by elements in an environment