[BIO SCI 93] - Final Exam Guide - Comprehensive Notes for the exam (52 pages long!)
29 Nov 2016
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BIO SCI 93 Full Course Notes
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Matter: anything that takes up space and has mass e. g. : living organisms, rocks, gases. Element: substance which cannot be broken down by chemical reactions e. g. : gold, copper, etc. Compound: combination of two or more different elements in a fixed ratio e. g. : table salt (nacl) Essential elements: needed for a organism to live a healthy life and reproduce. Trace elements: elements required by organisms in only small quantities e. g. : iodine and arsenic. Compounds have emergent properties, meaning that their properties are different from its elements. Humans need 25 elements; plants need 17. Oxygen, carbon, hydrogen, and nitrogen make up 96% of living matter. Calcium, phosphorus, potassium, and sulfur make up the 4% Some trace elements are required by all forms of life (like iron), while others are required by certain species. Half-life isotope: the time it takes for 50% of the parent isotope to decay (into its daughter isotope)
