CCU bio 121 exam 1 questions and correct answers a+ score

hypothesis - correct answers an educated guess, lowest in forms of reputation theories in science - correct answers years of testing, with no disapproval or no evidence so far OQHPTCP - correct answers observations, questions, hypothesis, prediction, testing, conclusion, publish IMRAD - correct answers introduction, methods, results, discussions RCT - correct answers randomized control trial RCDBT - correct answers randomized control double blind trial gold standard for experiments - correct answers RCDBT is natural experiments - correct answers naturally occurring with no manipulation from humans example of natural experiment - correct answers covid example of theory in science - correct answers theory of gravity- just a theory because its the current understanding of gravity Darwins observation 1 - correct answers organisms reproduce faster than necessary to replace themselves Darwins observation 2 - correct answers organisms vary, and that variation is often inherited Darwins observation 3 - correct answers some variants survive or reproduce better than others Darwin concluded - correct answers if only some variants survive or reproduce, then the next gen will resemble the successful ones importance of evolution - correct answers all living things are related, lessons learned in one species apply to others classification 1 - correct answers domain classification 2 - correct answers kingdom classification 3 - correct answers phylum classification 4 - correct answers class mammalia classification 5 - correct answers order carnivora classification 6 - correct answers family canidae classification 7 - correct answers genus canis classification 8 - correct answers species lupus Carl Woese - correct answers three domain based on r RNA (eukarya, bacteria, archaea) CHON - correct answers carbon, hydrogen, oxygen, nitrogen Oxygen, O - correct answers 65% Carbon, C - correct answers 18.5% Hydrogen, H - correct answers 9.5% Nitrogen, N - correct answers 3.3% Atoms - correct answers protons, neutrons, electrons protons and neutrons - correct answers found in the nucleus electrons - correct answers orbit the nucleus atomic number - correct answers protons atomic mass - correct answers number of protons and neutrons isotopes - correct answers atoms that have the same atomic number, but different atomic weights radiosiotopes - correct answers radioactive isotope, usually used for x-rays # electrons - correct answers # protons electron shell - correct answers an energy level of electrons at a characteristic average distance from the nucleus of an atom valence electrons - correct answers electrons in the outermost shell unpaired valence electrons - correct answers react with other atoms how do atoms fill their outer shells? - correct answers they form chemical bonds types of chemical bonds - correct answers covalent, ionic, hydrogen covalent bonds - correct answers shared pairs of electrons, strongest bond pic of covalent bond - correct answers polar covalent bonds - correct answers occur between two atoms that differ in electronegativity (O) hydrogen bonds - correct answers occur between polar molecules, partial negative and partial positive, weak bonds pic of hydrogen bond - correct answers ionic bonds - correct answers atoms gain or lose electrons to become ions, weaker than covalent, opposite charges attract. pic of ionic bond - correct answers cations - correct answers positive charged ions anions - correct answers negative charged ions hydrophilic - correct answers water loving: salts, alcohols, ammonia hydrophobic - correct answers water fearing ions - correct answers formed by loss or gain of electrons life originated - correct answers in the sea humans are - correct answers 65% water surface tension - correct answers example of waters cohesion polar water molecules - correct answers surround ions water efficiently - correct answers dissolves ionic compounds when will large molecules dissolve in water? - correct answers if there are charges on their surface high specific heat - correct answers slow to change temp high heat of evaporation - correct answers vaporizing water carries away a lot of heat energy ice floats - correct answers solid water is less dense than liquid water hydrogen bonds in ice - correct answers form an open structure special properties of water - correct answers cohesive/adhesive, excellent solvent of ionic and polar compounds mole - correct answers 6.02 x 10^23 molarity - correct answers concentration of aqueous solutions chemical compounds containing carbon - correct answers organic compounds all life on earth is based on molecules built around - correct answers carbon carbon is - correct answers tetravalent methane - correct answers CH4 ethane - correct answers C2H6 ethene (ethylene) - correct answers C2H4 hydroxyl - correct answers OH- carboxyl - correct answers COOH