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Bio Chapter 10
Honors Biology Vocabulary
Term | Definition |
---|---|
Creationist Theory | the theory that over 7 days of creation, the universe and all life was created by a supernatural entity (like God) in their present form no more than 6,000 - 10,000 years ago |
Intelligent Design | proposes that the complexity of nature supports the existence of an intelligent mind |
Usher | worked out the year of creation based on dates in the Bible |
Lightfoot | came up with 9 a.m. as the time of creation |
Panspermia | the idea that life on Earth originated from some extra-terrestrial source |
Spontaneous Generation / Abiogenesis | |
Jan van Helmont | a Belgian botanist who came up with a recipe for mice |
Biogenesis | life comes from life |
Louis Pasteur | showed that bacteria that spoiled wine didn't spontaneously develop in the wine bottle |
Oparin Theory | life could have risen spontaneously on Earth under different environmental conditions (like if there was no oxygen) |
Primordial Sea | an ancient sea composed of a rich mux of organic molecules |
Miller & Urey | created a machine that experimentally recreated the conditions of "early Earth" as described by Oparin |
Evolution | living organisms can change over a long period of time as a consequence of adapting to their environment |
Indirect Evidence | doesn't show change, but acts as support for the process |
Direct Evidence | process of change can be observed |
Fossils | the remains or traces of organisms that once lived in a previous geological time period |
Paleontology | the study of ancient life |
Sedimentary Rock | rock formed as sediments pile on top of each other & compress into rock |
Bioglyphs | traces left by the passing of an organism |
Molds | hollow impressions left behind when the original organism decayed |
Cast | hollow space left subsequently filled in by sediments, assuming the shape of the original organism is based on the mold |
Petrified | organic material turned to stone |
Mineral Infiltration | the slow decay of organic molecules that are replaced by minerals dissolved in ground water |
Relative Dating | doesn't give an exact age but only its relation to other specimens |
Law of Superposition | in undisturbed rock layers, older fossils are found below younger fossils |
Absolute Dating | determining approximate age in years by measuring known chemical/physical process that changes with time |
Radiometric Dating | measuring the decay of radioactive elements |
Half-Life | the amount of time it takes for 1/2 of the parent material to decay into the daughter material |
Dendrochonology | tree ring dating that is only useful in areas that have continuous tree growth over extended period of time |
Pollen Dating | doesn't give the age of sample (unless pollen is C-14 dated) but plant species indicate climate conditions |
Molecular Clocks | a method that estimates the time required for a given amount of change based on genes that show a reliable rate of change (change in nucleotide sequences) graphed against dates known in fossil record |
Theory of Recapitulation | an organism's embryonic development repeats its evolutionary history |
Comparative Embryology | the more 2 organisms have in common in embryonic development, the more closely related they are |
Vestal Organs | the atrophied remains of organs that are currently no longer, but were used by the organism's ancestors |
Atrophied | shriveled up |
Homologous Organs | when different organisms possess organs that are similar in structure but have been modified to different functions |
Analogous Organs | organs that have different structure but similar function |
Industrial Melanism | change in an organism's color due to the effects of the industrial revolution |
Resistance | organisms becoming immune to chemicals used to control them |
Sexual Dimorphism | the display of different colors, shapes, or sizes based on sex of organnism |
Modern Synthesis | convergence of several lines of biological research into a unified theory |