Research blind spots and the optic nerve. then, perform an experiment to test what you learned. submit your observations in written form.

newton's first law of motion

unlike poles attract

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.