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Living Things Chap1

What is life?

TermDefinition
organism a living thing
cell the basic unit of structure and function in an organism
unicellular organisms that are composed of one cell
multicellular organisms that are composed of many cells
stimulus a change in an organism's surroundings that causes the organism to react
response an action or a change in behavior
reproduce to produce offspring that are similar to the parents
development the process of change that occurs during an organism's life
water the most abundant chemical in cells
carbohydrates a cell's main energy source
proteins one of the building materials of cells
lipids another building material of cells
nucleic acids the genetic material of cells
prokaryotic unicellular organisms whose cells do not have a nucleus
eukaryotic unicellular or multicellular organisms whose cells contain a nucleus
cell membrane outer membrane of a cell that controls movement in and out of the cell
cell wall an organelle that supports and protects cells
nucleus a large oval organelle that contains DNA and controls the cell's activities
cytoplasm the thick fluid region of a cell that holds the organelles in place
endoplasmic reticulum an organelle that moves things from one part to another
ribosome an organelle that makes proteins
golgi bodies an organelle that packages, stores, and gives energy to cells
mitochondria an organelle that breaks down food and gives energy to the rest of the cell
lysosome an organelle that cleans up the waste products from the cell
vacuoles an organelle that is a membrane-bound sac used for storage, digestion, and waste removal
chloroplast an organelle where photosynthesis (captures energy from sunlight and changes it to an energy form that cells can use in making food) takes place
Created by: peggyfergus
 

 



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