In a well-designed experiment, there will only be one factor tested at
any one time. If there are more factors than this being tested, the
results can become quite convoluted, less focused and more difficult to
understand. Although it might seem that the more you test the more you
know, this is not the best way to obtain accurate results.
Organisms that can only grow in a media having specific nutrients included in it are called a fastidious organism, this implies that these organisms have specific nutrient requirements for their growth.
MM 1 represents the minimal media which has basic nutrients present in it, however as the fastidious organisms require some particular or complex nutrients for their growth they can not grow on the minimal media.
Therefore, since the organisms that are given in the question is able to grow on the minimal media MM1, this implies that it is not a fastidious organism.
