BIO 121 Exam 1 115 questions with complete solution graded A+

True or False: nothing in science is proven - True Theory - well substained explanation of something in the natural world that can incorporate facts, laws, hypothesises etc Gravitational Theory - gravity is factual, there is a vast body of knowledge that explains the facts of gravity facts, inferences, laws, tested hypothesis Evolutionary theory - facts. evolution itself is factual. inferences, laws evolution accounts for the unity and diversity of life emergent properties - new properties emerge at each level in biological hierarchy result from arrangement of parts in an ecosystem/community number of protons determines: - what chemical element it is isotopes - same element, different number of neutrons valence shells - determine chemical properties lose, gain, or share to fill valence shell how many electrons are needed to fill a valence shell? - 8 except H and He (2) silicon dioxide - sand, glass