Why is it important to get a medical checkup prior to beginning a fitness program?
a. to check for preexisting conditions that would make some exercises dangerous
b. to decide upon the type training needed for different areas of the body
c. to determine what types of exercise equipment work best for your body
d. to determine which vitamin supplements would best complement a specific fitness regime
it's not b. cause i got that wrong. !

What is the main structural difference between enveloped and nonenveloped viruses? a) enveloped viruses have their genetic material enclosed by a layer made only of protein.b) nonenveloped viruses have only a phospholipid membrane, while enveloped viruses have two membranes, the other one being a protein capsid.c) enveloped viruses have a phospholipid membrane outside their capsid, whereas nonenveloped viruses do not have a phospholipid membrane.d) both types of viruses have a capsid and phospholipid membrane; but in the nonenveloped virus the genetic material is between these two membranes, while in the enveloped virus the genetic material is inside both membranes.