What organelle must temporarily break apart so that the dna can divide up?

The organelle that temporarily breaks apart so that the DNA can divide up is the nucleus. Nucleus store most of the cell's DNA it is responsible for carrying genetic information. It is also responsible for generating genetic expression to ensure the proper activities of the entire cells. 

Suitability of environment and tolerance.

Explanation:

Suitability of environment and tolerance is the reason which tells that an introduced species might be very successful in a new environment. The species have all the adaptations that helps in the survival of introduced organism. Strict checking on the airports and destruction of plant species that the person bring with it are the actions take by the government that prevent the introduction of additional new species in the ecosystem.