Factors that are important to keep your heart and lungs healthy are?

exercise regularly
maintaining a proper diet
not smoking tobacco
all of the above

How are the causes of the problems viewed? medical model public health model human services model. what is a method of treatment? medical model public health model human service modelj

In which book word demography is used for first time

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.