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organism

living things

cell

basic unit of structure and function in an organism

unicellular

single-celled organism

metabolism

combination of chemical reactions through which an prganism builds or breaks down materials

stimulus

a change in the organism's surronding

response

an action or a change in behavior

development

is the process of change that occurs during an organisms life producing more complex organsms

asexual reproduction

involes only one parent cell and produces offspring that are indntical to the parent

sexual reproduction

involes 2 parent cells and combines their genetic material to produce a new organism that differs from both parents

spontaneous generation

mistaken idea that living things can arise from non-living sources

controlled experiment

a scientist carries out a series of tests that are identical in every respest except for one factor

autotrophs

organisms that make their own food

heterotrophs

organisms that cannot make their own food

homeostasis

the maintaince of stable unternal conditions

domain

is the broadcast levelof organization

taxonomic keys

useful tools that help determine the identify of organisms

prokaryote

a unicellular organism having cells lacking a nucli

nucleus

is a dense area in cell that contains nuclus acids

eukaryotes

organisms with cells that contain nucli

evolution

recall that the process of change over time

species

with similar evolutionary histories are classified more clossley together

branching tree diagram

shows probable evolutionary relationship among organisms and the order in which specific charateristics may have evolved

classification

grouping together items based on the similarities

taxonomy

scinentific study of how organisms are classified

binomial nomenclature

each organism was given a unique, two part sientific name

genus

is a classification grouping that contains similar closly related organisms

species

a group of similar organisms that can mate with each other and produce offspring that can also mate and reproduce

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