20 terms

Science Sec 1 & 2

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organisms
Living Things
cell
(biology) the basic structural and functional unit of all organisms
unicellular
a type of organism that is made up of a single cell
multicellular
organisms that are composed of many cells that are specialized to do certain tasks
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 arise from nonliving sources
autotrophs
Organisms that are able to make their own food
heterotrophs
organisms that cannot make their own food and must feed on other organisms
homeostasis
the ability of a living thing to keep conditions inside its body constant
classification
the process of grouping things based on their similarities
taxonomy
the scientific study of how living things are classified
binomial nomenclature
Classification system in which each species is assigned a two-part scientific name/Linnaeus
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
prokaryotes
organisms whose cells lack a nucleus
nucleus
a dense area in a cell that contains nucleic acids-the chemical instructions that direct a cell's activities
eukaryotes
organisms with cells that contain nuclei
cell theory
a widely accepted explanation of the relationship between cells and living things