Final answer:
Homeostasis refers to the ability of organisms to maintain a steady internal environment. Examples include sweating to cool the body during a hot day via thermoregulation, and the regulation of blood glucose levels through the release of insulin and glucagon by the pancreas.
Step-by-step explanation:
Homeostasis is the ability of living organisms to maintain a stable internal state despite changes in external conditions. When you go for a long walk on a hot day, your body engages in homeostasis through thermoregulation to keep your body temperature within a healthy range. Sweating is part of the body's cooling system; as sweat evaporates from your skin, it removes heat, thereby cooling the body.
An example of an adaptation that has evolved in desert plants is their deeply rooted systems to tap into underground water. Additionally, animals, like the camel, have adapted to desert life by storing fat in their humps, which serves as both food and water source and by having the ability to withstand significant changes in body temperature, which minimizes water loss through sweating.
Another example of homeostasis in the human body is the regulation of blood glucose levels. After a meal, the pancreas releases insulin to help lower blood glucose levels, and when levels are too low, the pancreas releases glucagon to raise them, thus maintaining balance within the system.