We use the bow-wow method of definition which is often a favorite of philosophers. DNA stores the hereditary genetic information of an organism ii. RNA serves as a messenger when the information in DNA is transferred to RNA which then manufactures more proteins Life as we know it here requires liquid water.
Water has several remarkable properties.
Water remains in the liquid state over a large range of temperatures 5. There is a large heat of vaporization for water which helps us keep from overheating. There are other theoretical possibilities 1. That is, it freezes at about 108 Fahrenheit degrees at atmospheric pressure. It is not liquid over a wide range of temperature.