Which term describes any feed constituent that supports life?

The term that describes any feed constituent that supports life is "nutrient." Nutrients are substances that organisms need to survive, grow, and develop. They play crucial roles in various bodily functions, including energy production, growth, repair of tissues, and maintenance of overall health. Nutrients can be classified into several categories, such as carbohydrates, proteins, fats, vitamins, and minerals, each serving specific functions in the body.

In the context of animal feed, nutrients are essential components that promote health and productivity in livestock. For example, proteins are necessary for muscle development and maintenance, while vitamins and minerals contribute to metabolic processes and structural functions within the body.

Understanding the concept of nutrients is fundamental for those involved in animal husbandry and nutrition, as it informs decisions about feed formulation and dietary management to ensure optimal health and performance in cattle.