Question

how does biological age differ from chronological age?
a biological age is determined by your life expectancy;
it can change based on your chronological age.

b biological age is determined by the function of your
body systems; it can change based on your habits
and behavior.

c biological age is determined by genetics; how you
age can be influenced by heredity.

d biological age can only be calculated by a doctor;
there is no way to calculate it without medical tests.

Explanation:

• Option A: Biological age is not determined by life expectancy and doesn't change based on chronological age in that way.
• Option B: Biological age reflects the functional state of the body's systems. Lifestyle habits (like diet, exercise, stress management) can impact it, so it can change based on behavior, while chronological age is just the number of years since birth. This matches the correct understanding of the difference.
• Option C: While genetics can influence aging, biological age isn't solely determined by genetics; lifestyle also plays a major role, so this is incorrect.
• Option D: There are non - medical ways (like assessing physical performance, cognitive function) to estimate biological age, so this is wrong.

Answer:

B. Biological age is determined by the function of your body systems; it can change based on your habits and behavior.