Chapter 6 Science (8th)
Terms
undefined, object
copy deck
- Fossils
- remains of life from an earlier time
- Homo sapiens
- wise human
- Species
- a group of organism that look alike and can reproduce among themselves
- Lamarck's explanation of evolution
- evolution as a result of acquired characteristics
- homologous structures
- body parts that are similar in origin and structure
- vestigial structures
- body parts that are reduced in size with no apparent function
- radiometric dating
- telling age by amount of change in a radioactive element
- natural selection
- survival of the fittest
- variation
- a trait that makes an individual different from other members of its species
- embryology
- study of the development of the embryos of organisms
- relative dating
- estimate ages of fossils from sedimentary rocks
- gradualism
- evolution as a "slow change" of one species to another
- evolution
- change in hereditary features over time
- punctuated equilibrium
- "rapid" evolution with few intermediate forms
- hominid
- body part similar in origin and structure
- Homo habilis
- know as the 'handy man' because of simple stone tools found near the fossil
- Australopithecus
- fossil characterized by a small brain cavity but humanlike jaw and teeth -- earliest know hominid
- Cro-Magnon
- lived in art-decorated caves and their dead
- Neatherthal
- lived in family groups in caves and hunted with well-made stone tools
- adaptation
- any variation that makes an organism better suited to its environment
- Primates
- opposable thumb
- larger brain
- a characteristic that separates hominid from apes