Angela runs 30 minutes everyday, but her 5k race time is staying the same and she is not having fun anymore. What should she do to improve? A. Run a 5k everyday because practice makes perfect B. Add diversity to her exercise program to keep her from getting bored or lazy C. Continue focusing all of her time on running but she should try to run faster each time she runs D. Continue focusing all of her time on running but she should try to run farther each 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.