1 Beef should be cooked to an internal temperature of 165 degrees, poultry to 180 degrees, pork to 170 degrees, and ground beef to 170 degrees.  Keep foods out of the temperature danger zone â Once items are cooked, it is important to keep them warm or to refrigerate them promptly.
Lettuce (Lactuca sativa) is an annual plant of the daisy family Asteraceae.It is most often grown as a leaf vegetable, but sometimes for its stem and seeds.oday, the majority of lettuce is grown for its leaves, although one type is grown for its stem and one for its seeds, which are made into an oil. Most lettuce is used in salads, either alone or with other greens, vegetables, meats and cheeses.
The domestication of lettuce over the centuries has resulted in several changes through selective breeding: delayed bolting, larger seeds, larger leaves and heads, better taste and texture, a lower latex content, and different leaf shapes and colors.Work in these areas continues through the present day.actuca sativa is a member of the Lactuca (lettuce) genus and the Asteraceae (sunflower or aster) family. The species was first described in 1753 by Carl Linnaeus in the second volume of his Species Plantarum. Synonyms for L. sativa include Lactuca scariola var.