Place in the oven and roast for 1 1/2 hours, or 30 minutes per pound. 7. Test the roast to make sure it's done. Remove the lid or foil from the pan and insert a meat thermometer into the roast.1  Rare meat is done when its temperature has reached 125 degrees Fahrenheit(52 degrees Celsius).lace in the oven and roast for 1 1/2 hours, or 30 minutes per pound. 7. Test the roast to make sure it's done. Remove the lid or foil from the pan and insert a meat thermometer into the roast. 1  Rare meat is done when its temperature has reached 125 degrees Fahrenheit(52 degrees Celsius).
The eastern lowland gorilla has a black color. The mountain gorilla is black like the eastern lo â¦ wland gorilla, but the hair is longer. The adult male who controls the group develops silver hairs on his back, thus the name silver-back. 12 people found this useful.
Physical Characteristics. Gorillas are the largest of the great apes. With an extremely stocky body, gorillas can weigh up to 400 pounds. Silverbacks, the mature male of each gorilla group, have silver hair on their backs, and can stand up to six feet tall with an arm span of eight feet.espite their great size, gorillas are generally shy and peaceful, and live in groups, called troops, of five to 30 animals, with an average group size of about 11. Active during the day, gorillas spend most of their time looking for food.