The best surface to run on is one that's
a. as hard as possible so that it adds more stability to your foot.
b. uneven so that the tendons and ligaments in the ankles and knees are strengthened.
c. smooth and soft so that it can cushion the stresses of running,
d. hilly so that you can improve your cardiovascular endurance.

The outermost layer of your teeth is called the enamel and is made of?

Explain why methicillin resistant staphlococcus aureus (mrsa) is more prevalent now than it was only 30 years ago. a. antibiotics cause mutations in staphlococcus aureus that lead to an increase in the number of methicillin-resistant strains. b. methicillin resistance causes an infection to spread more rapidly.c. frequent and inappropriate use of methicillin-type antibiotics has provided selective pressure that has resulted in an increase in the proportion of methicillin-resistant strains of staphlococcus aureus.d. diseases like aids have made people more vulnerable to infections from staphlococcus aureus.

Which of the following choices is the most important to do before starting an exercise program? a. see your doctor b. talk to your friends for advice c. lift some weights d. measure your body fat