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Biology 121 Exam 1 Questions and Correct Answers.
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Biology 121 Exam 1 Questions andCorrect Answers
Hiearchy of life order - correct answers:bio-eco-com-pop-organism-organ syst-organ-tissue-cell-
organelle-molecule-atom /each step causes new properties to emerge as result of interaction among
lower level components
systems biology - correct answers:model dynamic behavior of a whole biological systems based on a
study of interactions among systems parts
reductionism - correct answers:complex systems broken down to simpler components that are more
manageable to study
Energy - correct answers:energy from sunlight-converted to chemical energy by producers-passed to
consumers
cell - correct answers:organisms basic unit of structure and function
eukaryotic cells - correct answers:contain membrane-enclosed organelles including dna-containing
nucleus
prokaryotic cells - correct answers:lack dna containing nucleus or membrane
DNA - correct answers:long linear polymer in the nucleus of cell formed from nucleotides and shaped
like a double helix transfers heritable info from parents to offspring
gene expression - correct answers:conversion of the information encoded in a gene first into messenger
RNA and then to a protein
, genomics - correct answers:study and comparison of genomes within a single species or among different
species
positive feedback - correct answers:Feedback that tends to magnify a process or increase its output.
regulation common to life at all levels which regulate biological systems
natural selection - correct answers:the principle that, among the range of inherited trait variations, those
that lead to increased reproduction and survival will most likely be passed on to succeeding generations
inquiry - correct answers:scientists make observations by collecting data
inductive reasoning - correct answers:drawing a general conclusion
hypothesis - correct answers:a proposal intended to explain certain facts or observations
deductive reasoning - correct answers:predictions that can be used to test hypotheses made from
inductive reasoning
controlled experiments - correct answers:designed to demonstrate effect of 1 variable by testing control
groups and experimental groups that differ in only that one variable
scientific theory - correct answers:generated new hypotheses that is supported by large body of
evidence
technology - correct answers:method or device that applies scientific knowledge for some specific
purpose that affects society
molecule - correct answers:consists of atoms
organelle has - correct answers:orderely arrangement of molecules
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