Question

What are antibiotics, pathogens, pasteurisation and nitrogen fixation?

Answer 1

Antibiotics: also known as antibacterials, are types of medications that destroy or slow down the growth of bacteria. Antibiotics are used to treat infections caused by bacteria.
Pathogens:An agent that causes disease, especially a living microorganism such as a bacterium, virus or fungus.
Pasteurization (or pasteurisation): process of heat processing a liquid or a food to kill pathogenic bacteria to make the food safe to eat and stay fresh.The process is named after Louis Pasteur.
Nirogen fixation: process by which free nitrogen (N₂) is extracted from the atmosphere and converted (fixed) into nitrogen compounds which are plant nutrients (fertilizer). In nature, this process is carried out by certain bacteria (present in the root nodules of leguminous plants such as beans and peas), blue-green algae and the lightning flash.