The answers are insulin?glucose. After a meal, the digestion of carbohydrates in the intestines release sugars , which are absorbed into the blood. If food contained high levels of simple sugars then blood sugars level rises quickly. Insulin is a hormone which is released by the pancrease in response to rising blood sugar levels. Insulin causes sugars to be stored in the liver in the form of glycogen and this in turn lowers your blood sugar level.
Your body through the cells
The given example suggests the principle of resource partitioning.
The resource partitioning is a method of division of resources present in a particular niche to avoid the competition. In this case, the organism divide the regions having the abundant resources and they do not interfere in each others region.
In this case, the resource partition takes place by dividing the regions in the flask. one species use he resources present in the middle region and other uses the resource in the bottom.
