You can run, but you can't hide when it comes to bacteria. They can be found everywhere on earth, from Antarctica to the inside of your intestines! Some are good, aiding digestion and giving us tasty food like cheeses and yogurt. Many are harmful, causing serious diseases; these are called pathogenic bacteria.hey are often able to cure once-fatal diseases, such as the bacterial infection scarlet fever. Amoxicillin, penicillin, and erythromycin are common antibiotics that inhibit bacterial cell functions. Antibiotics are derived primarily from bacteria or fungi (mold), such as Penicillium.
Full Definition of OPTICS. : a science that deals with the genesis and propagation of light, the changes that it undergoes and produces, and other phenomena closely associated with it.ADVERTISEMENT.. : a science that deals with the genesis and propagation of light, the changes that it undergoes and produces, and other phenomena closely associated with it.
The Optic Nerve is the second of the Twelve Cranial Nerves. It consists of both afferent and efferent visual sensory fibers. The word afferent means toward the centre, as in from a peripheral area of a limb to the central nervous system. Henceforth the optic fibers travel within the optic nerve, known as the optic tract. 2  At the optic chiasm, half of the fibers continue into the optic nerve proper, while the other half cross over and continue on the contralateral side and vice versa.