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23 terms

Science Test Ch. 2

A quiz that will help you for Dr. B's test on 10-15.
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organism
living thing
cell
the basic unit of structure and funciton in an organism
unicellular
single-celled organisms
multicellular
organisms that are composed of many cells that are specialized to do certain tasks
autotroph
an organism that makes its own food
heterotroph
an organism that cannot make its own food
homeostasis
the maintenance of stable internal conditions despite external conditions
stimulus
a change in an organism's surroundings that causes the organism to react
response
an action or change in behavior
development
the process of change that occurs during an organism's life to produce a more complex organism
spontaneous generation
the mistaken idea that living things can arise from nonliving sources
classification
the process of grouping things based on their similarities
taxonomy
the scientific study of how living things are classified
binomial nomenclature
the naming system Carolus Linnaeus used
genus
a classification grouping that contains similar, closely related organisms
species
a group of similar organisms that can mate with each other and produce offspring that can also mate and reproduce
prokaryote
organisms whose cells lack a nucleus
eukaryote
organisms with cells that contain nuclei
nucleus
a dense area in a cell that contains nucleic acids-the chemical instructions that direst the cell's activities
microscope
an instrument that makes small objects look larger
cell theory
a widely accepted explanation of the relationship between cells and living things
magnification
the ability to make things look larger than they are
resolution
another term for the sharpness of an image