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Section 1

Terms and definitions

TermDefinition
Biology The study of life
Organization The 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 life's processes
Unicellular Some organisms, such as bacteria, are made up of one cell and are called unicellular organisms.
Multicellular Organisms such as humans or trees are made up of multiple cells and are called multicellular
Organ Are structures that carry out specialized jobs within an organ system
Tissues Are groups of cells that have similar abilities and that allow the organ to function
Organelles Are tiny structures that carry out functions necessary for the cell to stay alive
Biological molecules Organelles contain biological molecules, the chemical compounds that provide physical structure and that bring about movement n energy use, and other cellular functions
Homeostasis Is the maintenance of a stable level of internal conditions even though environmental conditions are constantly changing.
Metabolism Is the sum of all the chemical reactions that take in and transform energy and materials from the environment
Cell division Is the formation of two new cells from an existing cell.
Development Is the process by which an organism becomes a mature adult
Reproduction The process of producing offspring
Gene A short segment of DNA that contains the instructions for a single trait of an organism is called a gene
Created by: 28473
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