BIOL 1030 Study Guide - Midterm Guide: Keratin, Bicarbonate, Stoma
Document Summary
They are injected in small quantities and are used to track atoms through metabolism: radiometric dating: an isotope decays into parts at a fixed rate, known as half-life of the isotope. This helps in water being transported in plants against gravity. Celsius: water has high specific heat, i. e. heat absorbed or lost for 1 gm of substance to change its temperature by 1 degree. Same amount of heat will raise the temperature of 1 gm iron faster than 1 gm water. Heat absorbed is first used to break bonds and then to raise water"s temperature. This helps to moderate air temperature: evaporative cooling: when water is heated, its most kinetic molecules get liberated and form gas, thus reducing the temperature of the surface, causing evaporative cooling. This difference in shape dramatically affects the biological activities of organic molecules: enantiomers: isomers that are mirror images of each other and differ in shape due to the presence of an asymmetric carbon.
