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Chapter 1


Biology the study of life
Organization the high degree of order within an organism's internal and external parts and in its interactions with the living world
Cell smallest unit that can perform all life's processes
Unicellular organisms made up of only one cell
Multicellular organisms made up of multiple cells
Organs structures that carry out specialized jobs within an organ system
Tissues groups of cells that have similar abilities and that allow the organ to function
Organelles tiny structures that carry out functions necessary for the cell to stay alive
Biological Molecules chemical compounds that provide physical structure and that bring about movement, energy use, and other cellular functions
Homeostasis maintenance of a stable level of internal conditions even though enviromental conditions are constantly changing
Metabolism sum of all chemical reactions that take in and transform energy and materials from the environment
Cell division formation of two new cells from an earlier distinguish cell
Development process by which an organism becomes an adult
Reproduction organisms producing new organisms like themselves
Gene short segment of DNA that contains instructions for a single trait
Domains three major subdivisions of organisms
Kingdoms six major grouping categories
Ecology study of organisms interacting with each other and with the environment
Ecosystems communities of living species and their physical environments
Evolution descent with modification
Natural Selection organisms with certain favorable traits are better able to survive and reproduce successfully
Adaptations traits that improve an individual's ability to survive and reproduce
Scientific Method an organized approach to learn how the natural world works
Observation act of perceiving a natural occurrence that poses a question
Hypothesis a proposed explanation for the way a particular aspect of the natural world functions
Prediction statement that forecasts what would happen in a test situation should the hypothesis be true
Experiment used to test a hypothesis and its predictions
Control Group a normal standard to compar against the experimental group
Experimental Group group being tested
Independent Variable a manipulated variable
Dependent Variable responds to independent variable
Theory a set of related hypothesis confirmed many times and explains a great amount of data
Peer Review experts anonymously review and critique a research paper
Created by: Marcos Arias