Janet is an active 50 year old runner and she has been running for almost all her life. she visited her local physician for chronic concern of joint pain. after several visits, the physician is unable to diagnose her because she is showing symptoms of several disorders of the joints - arthritis, rheumatoid arthritis, osteoarthritis and bursitis. what are some similarities and differences between these disorders? do you think that janet's running habits contribute in any way to these disorders?

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.