Mammals are able to meet their energy demands due to which of the following reasons?They have access to energy rich dietThey have an effective digestive systemThere is complete segregation of the oxygenated and deoxygenated bloodThere is complete breakdown of glucose to produce energy

All of the reasons listed contribute to mammals' ability to meet their energy demands:

1. Access to energy rich diet: Mammals consume a variety of foods that are rich in nutrients and energy. This includes proteins, carbohydrates, and fats, all of which are broken down and used to fuel the body's processes.

2. Effective digestive system: Mammals have a complex and efficient digestive system that allows them to extract nutrients and energy from the food they consume. This includes various organs and enzymes that break down food into its constituent parts for absorption.

3. Complete segregation of oxygenated and deoxygenated blood: Mammals have a four-chambered heart that completely separates oxygenated and deoxygenated blood. This allows for efficient oxygen delivery to the tissues and organs of the body, which is crucial for energy production.

4. Complete breakdown of glucose to produce energy: Mammals are able to completely break down glucose, a simple sugar, to produce ATP (adenosine triphosphate), the body's main energy currency. This process, known as cellular respiration, is highly efficient and provides the energy needed for various bodily functions.