7-8 Flashcards
A group of organisms that are closely related and can mate to produce fertile offspring
Species
The process in which populations gradually change over time
Evolution
The remains of imprints of once living organisms found in layers of rock
Fossil
A historical sequence of life indicated by fossils found I. Kate’s of the early crust
Fossil records
A genetically determined characteristics
Trait
The human practice of breeding animals or plants that have certain desired traits
Selective breeding
The process by which organisms that are better adapted to their environment survive and reproduce more successfully than les well adapted organisms do
Natural selection
The period between the birth of one generation and then birth of the next generation
Generation time
The formation of new species as a result of evolution
Speciation
Any method if determining whether an event or object is older or younger than other event or objects
Relative dating
Any method of measuring the age of an object or event in years
Absolute dating
The standees method used to divid the earths long natural history into manageable parts
Geologic time scale
Describe a species that has died out
Extinct
The theory that explains how large pieces of the earth outermost layer call tectonic plates move and change shape
Plate tectonics
The period in the geological time scale from the formation of the earth to the Beijing of the Paleozoic era from about 4.6 billion to 542 million years ago
Precambrian time
The geologic era that lasted from 251 million to 65.5 million years ago
Mesozoic era
The most recent geologic era
Cenozoic era
A type of primate chacacterized by bipedalism
Hominid
The species of hominids that includes morn humans and their clips test ancestors
Homo sapiens
A characteristic that improves an individual’s ability to survive and reproduce Ina particular environment
Adaptation
