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Vocab 1-1

Chapter 1-1 vocabulary

TermDefinition
Biology The study of life
Organization High degree of order within an organisms internal and external parts and in its interactions with the living world
Cell The smallest unit that can perform all lifes processes
Unicellular Organisms made up of one cell
Multicellular Organisms made up of multiple cells
Organ Structures that carry out specialized jobs within an organ system
Tissue Groups of cells that have similar abilities and that allow the organ to function
Organelle Tiny structures that carry out functions necessary for the cell to stay alive
Biological molecule The chemical compounds that provide physical structure and that bring about movement, energy use, and other cellular functions
Homeostasis The maintenance of a stable level of internal conditions even though environmental conditions are constantly changing
Metabolism The sum of all the chemical reactions that take in and transform energy and materials from the environment
Cell division The formation of two new cells from an existing cell
Development The process by which an organism becomes a mature adult
Reproduction All organisms produce new organisms like themselves
Gene A short segment of DNA that contains the instructions for a single trait of an organism
Cytology The study of cells
Domain Three major subdivisions of all organisms
Kingdoms Divides all life into six major categories
Ecology The branch of biology that studies organisms interacting with each other
Ecosystem Communities of living species and their physical environments
Evolution The inherited characteristics within populations change over generations
Natural Selection Organisms that have certain favorable traits are better able to survive and reproduce successfully than organisms that lack these traits
Adaption Traits that improve an individual's ability to survive and reproduce
Scientific Method Learn how the natural world works
Observation The act of perceiving a natural occurrence that causes someone to pose a question
Hypothesis Educated guess
Prediction Statement that forecasts what would happen in a test situation if the hypothesis were true
Experiment Used to test hypothesis and predictions
Control Group Provides the normal standard against which the biologist can compare results of the experimental group
Experimental Group Identical to control group except for one factor
Independent Variable The factor that is changed from the control group and the experimental group
Dependent Variable Affected by the independent variable
Theory A set of related hypotheses is proven to be true many times
Peer Review Scientists anonymously read and review other scientists work
Created by: cjangard
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