Why can a skeleton see it self through the X-ray?

because he had no flesh

Sushi or chicken tender with barbecue sauce? which is your favorite? which is better for your health?

Catalina ate a candy bar and then went on a fast-moving ride in an amusement park. she was sick to her stomach after the ride and now, catalina cannot eat candy bars, because they make her nauseous. in this learned association, the candy bar serves as a(n) to catalina.

Which of these is a controllable risk fator for disease