A bacillus or bacilliform bacterium is a rod-shaped bacterium or archaeon.
In 1665, Robert Hooke observed D. Cell Walls through a microscope!
Two examples of radioisotopes that can be used are carbon-14 to determine the age of fossils. Second, we can use iodine-131 to treat thyroid disease.
The first step in designing an experiment is the form a testable question.
It is called the Epidermis. The epidermis, the outermost layer of skin, provides a waterproof barrier and creates our skin tone. The dermis, beneath the epidermis, contains tough connective tissue, hair follicles, and sweat glands.
