A liver cell and a cheek cell have the same chromosomes. The only cells in the human body that do not contain 46 chromosomes are reproductive cells, which only contain 23 chromosomes, according to... Star Gazing
A beef roast cooked to medium-rare should have an internal temperature of 145Â°F - 150ÂºF after the resting period, and a roast cooked to medium should have an internal temperature of 150Â°F to 160ÂºF. (See the note below). See Beef Doneness for more information on proper cooking temperatures.
  My sister-in-law taught me the perfect way to cook a roast beef. Preheat oven to 400, put roast in a pan with 1 cup of water, season with salt & pepper, and quarter one â¦ peeled onion and place around the roast.   Cook for 1/2 hour, then reduce the temperature to 350 and cook for an hour.