Why does a microscope slide need to be transparent

The microscope slide needs to be transparent so it allows the light to pass through it, which causes the microscope to magnify the slide and the object on the slide. The light must come from beneath it in order for you to the object clearly.

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.