What is the purpose of a mollusk's gills, and where are they located?

Which of the follow is good way to gauge musculature endurance?

A72-year-old woman fell in her bathtub and fractured her hip. in viewing the fracture, x-ray revealed osteoporotic changes in her bone as well. after reduction of the fracture, and immobilizing the bones with internal pins, what type of exercise would the doctor have advised her to do as soon as she was able in addition to prescribing calcium supplements to improve her bone mass?

When you have proper posture, your back is arched. a. true b. false