1 Viruses are: friendly bacteria, aid in biological functions.
the smallest known type of infectious agent.
The body's natural defenses against infection.
None of the above

Why is it so important to have a lifetime commitment to training? a-it takes your entire life to become fit b-it keeps you from becoming bored c-you will lose strength and endurance once you stop exercising d-it increases your motivation in life

Amino acids are important to the body because they build carbohydrates proteins complex carbohydrates simple sugars fats

An _ exposure is a repeated or prolonged exposure(over months or years) that may bring about slowly developing symptoms.