BIO152H5 Lecture Notes - Lecture 2: Nitrogenous Base, Alfred Noble Prize, Chronic Wasting Disease
Document Summary
Life originated in water; properties of water that support life. Organization of living organisms at the molecular level, with emphasis on macromolecules: evolutionary connection. Carbs, proteins, nucleic acids, dna and mutations. Life on earth began in water and evolved for 3 billion years. Adhesion: hydrogen bonds b/w water and other molecules. Surface tension: measure of how difficult it is to break surface of water, and strength of. Evaporation: occurs b/c the hottest molecules w/ highest kinetic energy leave as a gas: transformation from liquid to gas, h bonds have to be broken for liquid water to become vapour. Water 3 states: ice floats, ice is less dense than water, many organisms depend on ice as a surface to live on, hunt on etc, water is the solvent of life. Large molecules: what is their importance in the study of evolution: all organisms contain them: proteins, carbs, nucleic acids, and lipids.
