Standing on the surface of the earth you have a weight of 100 N. If you were to travel until you were 2 earth radii above the surface of the earth your weight would be?
b.) 11 N
c.) 25N
d.) 50 N
e.) about 100N
a.) 0N

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.