When observing a specimen in a microscope you are told that the total magnification of the specimen is 630x assuming you are using a standard occular lens with a magnification of 10x what is the magnification of the objective lens?

vapour or gas assuming atmospheriv pressure

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.