The Average Life Span of a Fly. The house fly is one of more than 120,000 species of flies in the world. Temperature is a large factor in each stage of a fly's life. For example, after hatching from his egg in less than a day, a house fly may spend days or weeks in each of the other stages of development.
Flank Cuts. Flank steak is a relatively lean cut of beef. For less than 165 calories, you can have a 3-ounce broiled flank steak. The biggest percentage of those calories, or 60 percent of calories, are from protein. This serving of flank steak has close to 100 calories from protein.
According to the U.S. Department of Agricultureâs National Nutrient Database for Standard Reference, 1 ounce of 90-percent-lean ground beef contains 92 calories, and a 1-ounce portion of boneless, lean pork loin provides just 37 calories.