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.
The gorilla family is divided into two main groups. The first of these is Gorilla gorilla, which includes the western lowland gorillas (G. g. gorilla) and the Cross River gorillas (G. g. diehli). The second group is Gorilla beringei, which is made up of mountain gorillas (G. b. beringei) and the eastern lowland gorillas (G. b. graueri). The main differences between the groups are where they live, their color and how long their hair is, but all of the different species tend to have similar life spans.