Unit used to measure the amount of energy that people get from food is called

Maintaining a healthy weight allows the respiratory system to work more effectively because a. oxygen is being delivered more adequately. b. the heart does not have to pump as forcefully. c. the capillaries are constricted. d. the lung capacity allows for small amounts of air.

If the singular term ends in -us, the plural is usually formed by changing the ending to

Which one of the doll choices is a bio marker of biological again that can you determine whether or not you’re doing or worse than your chronological age