Final answer:
The correct flowchart that lists the structures in order from smallest to largest is nucleosome, DNA, chromosome, chromatin.
Step-by-step explanation:
The correct flowchart that lists the structures in order from smallest to largest is option b: nucleosome, DNA, chromosome, chromatin.
A nucleosome is the basic structural unit of DNA packaging in eukaryotes. It consists of DNA wrapped around histone proteins. So, it is smaller than DNA.
DNA is a molecule that contains the genetic instructions used in the development and functioning of all living organisms. It is larger than nucleosomes but smaller than chromosomes.
A chromosome is a tightly coiled structure made up of DNA and proteins. It contains hundreds or thousands of genes and is visible during cell division. So, it is larger than DNA.
Finally, chromatin is the complex of DNA, proteins, and RNA that makes up chromosomes. It is the largest structure in the list.