Biology 121 Exam 1| 141 Questions and Answers(A+ Solution guide)

Hiearchy of life order - bio-eco-com-pop-organism-organ syst-organ-tissue-cell-organelle-moleculeatom /each step causes new properties to emerge as result of interaction among lower level components systems biology - model dynamic behavior of a whole biological systems based on a study of interactions among systems parts reductionism - complex systems broken down to simpler components that are more manageable to study Energy - energy from sunlight-converted to chemical energy by producers-passed to consumers cell - organisms basic unit of structure and function eukaryotic cells - contain membrane-enclosed organelles including dna-containing nucleus prokaryotic cells - lack dna containing nucleus or membrane DNA - 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 - conversion of the information encoded in a gene first into messenger RNA and then to a protein genomics - study and comparison of genomes within a single species or among different species positive feedback - Feedback that tends to magnify a process or increase its output. regulation common to life at all levels which regulate biological systems