Glycogen is a carbohydrate polymer in which animals store their excess glucose as. When animals digest their ingested food, it gets broken down into GLUCOSE. This glucose, when in excess, gets stored as GLYCOGEN.
According to this question, a substance found at a crime scene is being examined using chemical tests. The test revealed that glycogen is present in the substance. This can mean that the substance is from an ANIMAL source because GLYCOGEN is only present in animals.
I, myself, took the exam, but also glycogen is found in animals cells. It is a branch of glucose that is usually stored in liver and the skeletal muscle.
One reason could be that there are a high number of predators killing rabbits in large quantities. Another is there may not be enough vegetation for the rabbits. They may also have a different animal competing for the same kinds of plants they eat.
