BIO 156 EXAM 1 QUESTIONS WITH 100 % CORRECT ANSWERS | VERIFIED

Hierarchy of organization - -atoms, molecules, cell, tissue, organs, organ system, organism -organism, population, community, ecosystem, biosphere characteristics of living things - organized, need nutrients and energy, respond to stimuli, reproduce and develop, adapt Scientific process - observation, hypothesis, experiment/further observation, data, conclusion homeostasis - internal balance, process by which organisms maintain a relatively stable internal environment element - 92 natural occurring, Carbon hydrogen, nitrogen, oxygen, phosphorus, sulfur CHNOPS - Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus, Sulfur atom - smallest particle of elements atomic number - number of neutrons in the atom atomic mass - neutrons + protons periodic table - vertical- groups, chemically similar horizontal- periods, larger and larger isotopes - atoms of the same element that have different numbers of neutrons electron shells - different energy levels referred to as electron shells oclet rule - inner shell has 2 orbitals, others have 8, or multiples of 8if 3 or less - tends to donate if 5 or more - tends to recieve molecule - two or more atoms bonded together compound - group of atoms where at least one is different chemical bonding - bonds between atoms caused by electrons in outer most shells, bond formation is called reaction ionic bond - chemical attraction between ions of opposite charge ex: sodium and chloride. covalent bonds - form when electrons are shared between atoms hydrogen bonds - weakest, H becomes slightly +, O slightly - propertties of water - moderates temp. high heat capacity,