Because the heart, the blood and blood vessels all work together to perform the job of moving things around the body, they are considered to be: a an organ system b a cell c a tissue d an organism

Which of the following identifies the main culprit for america’s increasing weight gain?

The dietary guidelines for americans recommend (a) avoiding smoking. (b) engaging in aerobic exercise for 60 minutes at least five days a week. (c) making all of your grain choices whole grains. (d) increasing your intake of fruits and vegetables.

Antibiotics are given when an std is caused by a virus. true or false