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.
1 138 calories in a 3 oz or 85g small size serving of lean roast beef. 2  230 calories in a 5 oz or 142g medium size serving of lean roast beef. 3  369 calories in an 8 oz or 227g large size serving of roast beef.