The graph shows the percentage of the US population that were obese in 1960 to 2010. A graph titled U S Obesity Trends over Time shows years on the horizontal axis and percentage of populate obese on the vertical axis. The graph shows an upward trend from 13% in 1960 to 36% in 2010.

Which statement best describes the obesity trend in the United States from 1960 to 2010?

Obesity has almost tripled.
Obesity has doubled.
Obesity has quadrupled.
Obesity has remained the same.

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.