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21 Cards in this Set

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  • Back
all the parts of the planet that are inhabited by living things
biosphere
community of living things plus the nonliving features of the environment that supports them
ecosystem
living thing
organism
basic unit of living matter
cell
the chemical responsible for inheritance
DNA
unit of inherited information in DNA
gene
distinct form of life
species
broadest category used to classify
domain
consisting of a single cell
unicellular
cell lacking a nucleus and other internal organelles
prokaryotic
cell with nucleus and other internal organelles
eukaryotic
consisting of many cells
multicellular
complex organization formed from a simpler combination of parts
system
plants use the sun's energy to convert water and carbon dioxide into sugar
photosynthesis
organism that makes its own food
producer
obtains food by eating
consumer
steady state maintained by the body-internal stability
homeostasis
inherited characteristic that improves an organism's ability to survive and reproduce in a particular environment
adaptation
group of individuals of the same species living in a particular area at the same time
population
process by which individuals with inherited characteristics well-suited to the environment leave more offspring than do other individuals
natural selection
generation-to-generation change in the proportion of different inherited genes in a population that accounts for all of the changes that have transformed life over an immense time
evolution