Crest white strips only whiten the bottom half of my teeth? crest white strips never fully whiten my teeth it only whitens like half of each tooth. my teeth are pretty straight and i'm pretty sure i'm applying it correctly so how do i prevent this from happening

What is an important step to prove something is valid or not? determining the reliability observing research testing

Select all that apply. which of the following are functions of the skeletal system? 1. to provide the body with a strong and mobile framework 2. to allow the body to move 3. to protect internal organs from sunlight, bacteria, and injury 4. to supply the body with blood cells and minerals

Which describes the effect of prolonged stress on blood pressure? it causes blood pressure to decrease. it has little or no effect on blood pressure. it causes the heart to pump with more force. it causes blood pressure to increase.