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Extinction : when the last member of a species dies off
Biodiversity : variety of life in an area determined by population number
Genetic diversity : variety of genes or inheritable characteristics that are present in a population
Species Diversity : number of different species and the relative abundance of each species in a biological community
Ecosystem diversity : variety of ecosystems in the biosphere
Fossil : preserved evidence of an organism
Paleontologist : scientist who studies fossils
Relative dating : method to determine age of rocks
Law of superstition : younger layer of rocks are deposited onto older rock layers
Radiometric dating : decay of radioactive isotopes to measure age of a rock
Half life : amount of time it takes for half or the isotope to decay
Geological Time Scale : model that expresses major geological and biological events on earth’s history
Era : next largest division of the geological time scale
Periods : divisions of eras
Spontaneous Generation : the belief that life arose from nonlife
Phylogeny : evolutionary history of a species
Characters : inherited features that vary among species
Molecular Clock : model that shows how long a species has been evolving since they broke apart from a common ancestor
Cladistics : method that classifies organisms according to the order they diverged from a common ancestor
Chordates : animals that belong in the phylum Chordata
Invertebrate Chordate : chordates without a backbone
Notochord : flexible rod like structure that extends the length of the body
Postanal Tail : structure used for locomotion
Dorsal Tubular Nerve Chord : tube shaped chord above digestive organs
SB5-B
Across:1. | scientist who studies fossils | 6. | method that classifies organisms according to the order they diverged from a common ancestor | 8. | variety of life in an area determined by population number | 10. | preserved evidence of an organism | 11. | inherited features that vary among species | 12. | animals that belong in the phylum Chordata |
| 15. | tube shaped chord above digestive organs | 16. | amount of time it takes for half or the isotope to decay | 17. | when the last member of a species dies off | 18. | model that shows how long a species has been evolving since they broke apart from a common ancestor | 19. | evolutionary history of a species |
| | Down:2. | variety of genes or inheritable characteristics that are present in a population | 3. | model that expresses major geological and biological events on earth’s history | 4. | next largest division of the geological time scale | 5. | variety of ecosystems in the biosphere |
| 7. | decay of radioactive isotopes to measure age of a rock | 9. | divisions of eras | 13. | structure used for locomotion | 14. | flexible rod like structure that extends the length of the body |
| |
© 2015
PuzzleFast.com, Noncommercial Use Only
SB5-B
Across:1. | scientist who studies fossils | 6. | method that classifies organisms according to the order they diverged from a common ancestor | 8. | variety of life in an area determined by population number | 10. | preserved evidence of an organism | 11. | inherited features that vary among species | 12. | animals that belong in the phylum Chordata |
| 15. | tube shaped chord above digestive organs | 16. | amount of time it takes for half or the isotope to decay | 17. | when the last member of a species dies off | 18. | model that shows how long a species has been evolving since they broke apart from a common ancestor | 19. | evolutionary history of a species |
| | Down:2. | variety of genes or inheritable characteristics that are present in a population | 3. | model that expresses major geological and biological events on earth’s history | 4. | next largest division of the geological time scale | 5. | variety of ecosystems in the biosphere |
| 7. | decay of radioactive isotopes to measure age of a rock | 9. | divisions of eras | 13. | structure used for locomotion | 14. | flexible rod like structure that extends the length of the body |
| |
© 2015
PuzzleFast.com, Noncommercial Use Only