BIOL 1201 Lecture : Biology 1201 Notes
Document Summary
Duroia hirsuta devil"s garden protected by ants (stanford research team experiment: formic (formica=latin for ant) acid- chemical used by the ants, devil"s garden ant first to use acid as an herbicide. ***chemicals play a major role in insect communication, attraction of mates, & defense. Theme of the chapter: organization of life into a hierarchy of structural levels (+ additional properties, emergent properties are apparent at even the lowest level of organization. Matter-anything that takes up space and has mass. Element-substance that cannot be broken down into other substances by chemical reaction. Compound- substance consisting of two or more different elements in a fixed ratio: has different characteristics than its elements. Essential elements- organisms need to live a healthy life and reproduce (20-25%) ***four elements (o,c,h,&n) make up 96% of living matter. ***other 4% is ca,p,k,s, & a few others. Trace elements- required by an organism in only minute quantities (ex. iron & iodine)
