Answer:
The iodine might have got into the bag by the process of diffusion/osmosis.
<em>In the process of diffusion, particles move from an area of higher concentration to an area of lower concentration along a concentration gradient. </em>
As we know, the iodine solution in the large container had more particles of iodine whereas the baggie had none of the iodine solution. As a result, a concentration gradient developed due to which iodine solution moved into the baggie through the process of diffusion or osmosis.
The name of the other substance that is more plentiful and durable that can be analyzed is the mitochondrial DNA. Nuclear DNA is located within the nucleus of eukaryotes cells and usually have two copies per cell, while mitochondria DNA is located in the mitochondria, which are organelles that convert energy from food into a form that cells can use.