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science words walker
science words
Term | Definition |
---|---|
species | a group of organisms that share similar traits and can reproduce fertile offspring |
competition | a struggle between individuals and species for resources such as food living space mates and other resources |
natural selection | any variation that makes an organism better suited to its envoronment |
evolution | a change in a species over time |
Darwin | the naturalist who proposed the theory of evolution by natural selection |
variation | an inherited trait that makes an individual different from other members of its species |
population | all of the individuals of a species living in the same area |
adaptation | the mechanism of evolution where organisms with the traits best suited to the environment survive and reproduce |
mutations | permanent changes in an organisms genes |
Lamarck | the scientist who proposed the theory of acquired characteristics |
homologous structures | body parts of similar orgin and structure |
geographic isolation | when a new species is formed by a seperation of a mountain |
vestigial structures | body parts with no function |
radioactive dating | using radioactive elements to find the age of a fossil |
embryology | the study of developing organisms |
relative dating | using rock layers to find age of a fossil |
gene pool | all genes in a population that are available for reproduction |
fossils | remains of prehistoric organisms |
fossil record | evidence of organisms that have lived through out time |
dna evidence | evidence for evolution |
linneaus | swedish naturalist who developed the biological classification system |
archaebacteria | found in hot springs and salt ponds kingom of the domain called archaea |
plantae | includes bryophyta pterophyta and coniferophyta |
kingdom | 2nd largest group in biological classification |
eubacteria | causes salmonella and streptococcus |
domain | largest group in the biological classification system |
aristotal | developed the first classification system |
fungi | includes mushrooms and yeast |
dichotomus key | tool used to identify unknowen organisms |
archaea | includes the archaebacteria kingdom |
animalia | includes mammals |
eukarya | has all the main living organisms like animals and plants |
phylum | 3rd largest group in the biological classification system |
protista | includes protist |
bacteria | has the eubacteria kingdoom |
field guide | used to identify different animals and plants |
divisions | smaller groups in which plantae is divided in to |