Coitus interruptus, also known as the withdrawal. method, is the oldest form of male contraceptive. method to be practiced.[1] It involves the male partner. pulling out the penis before ejaculation.[1] Even though. it is the oldest method of male contraception to be. practiced, research has given it very little attention.
Updated September 18, 2016. Fermentation is an energy-yielding anaerobic metabolic process in which organisms convert nutrients (typically carbohydrates) to alcohols and acids (lactic acid and acetic acid). Fermentation is perhaps the most ancient biotechnological discovery.
Every fruit, vegetable, grain and domestic animal we see today is the result of genetic modification. Biotechnology refines and extends methods that produce new plants and animals. Biotechnology has a long history of use in food production and processing. For ten thousand years fermentation, a form of biotechnology, has been used to produce wine, beer and bread. Selective breeding of animals such as horses and dogs has been going on for centuries.