The correct answer would be carcinogens. Carcinogens can disrupt cellular homeostasis and can even lead to uncontrolled cell division and form of cancers. These are substances that damages the cellular metabolic processes in the body. Carcinogens are found everywhere; it may be in our food, radiation or even some of the ingredients of the things we use daily.
N light microscopy, oil immersion is a technique used to increase the resolving power of a microscope. This is achieved by immersing both the objective lens and the specimen in a transparent oil of high refractive index, thereby increasing the numerical aperture of the objective lens.
