If the nuclear membrane didn't exist, there would be a rule of what goes in the cell and what doesn't. Also bad germs or bacteria will get in the cell that will cause problems.
The correct answer would be Genetic diversity. Hope this helps.
The correct answer is - hierarchical
Each entry in a(n) hierarchical database has one parent node, with the parent node having several child nodes.
A hierarchical database model is a data model where the data is organized into a tree like structure. The data is stored as records and these are connected to one another through links.
Organisms do not choose to develop structures to help them survive. They are naturally born with instincts that can tell them what's to do to meet their needs.