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Bio I- Ch. 1 Vocab.

Organ A collection of tissues that carry out a specialized function of the body
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
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 in and transform energy and materials from the environment
Gene A short segment of DNA that contains the instructions for a single trait
Adaptation The process of becoming adapted to an environment
Evolution The heritable change in the characteristics within a population from one generation to the next
Natural Selection Organisms that have certain favorable traits are better able to survive and reproduce successfully than organisms that lack these traits
Hypothesis An idea or explanation that is based on observations and that can be tested
Experiment A procedure that is carried out under controlled conditions to discover, demonstrate, or test a fact, theory, or general truth
Control Group In an experiment, a group that serves as a standard of comparison with another group to which the control group is identical except for one factor
Experimental Group In an experiment, a group that is identical to a control group except for one factor and that is compared with the control group
Independent Variable In an experiment, the factor that is deliberately manipulated
Dependent Variable In an experiment, the factor that changes as a result of manipulation of one or more other factors
Theory An explanation for some phenomenon that is based on observation, experimentation, and reasoning
Metric System A decimal-based standard system of measurement that is used by scientists
Base Unit One of the fundamental units of measurement that describes length, mass, time and other quantities and from which other units are derived
Domain 3 major subdivisions of life
Kingdom Groups of organisms that divides all life into six main categories
Created by: archergirl