Fact 1: Mutations may change the structure of a chromosome or just change a single nucleotide.

Fact 2: Most mutations are beneficial to the organism.

Given the two facts above, answer the question "Changing the structure of a chromosome can be what to an organsim?" with the following options: 
- massive damage
 - mechanical
 - beneficial
 - harm them
 - negative
 - dangerous
 - homogenous
 - Damages them


 

   beneficial      