Ch. 22 - Descent with Modification: A Darwinian View of Life Flashcards
Descent with modification
Evolution
The remains or traces of organisms from the past
Fossils
Superimposed layers of rock formed as new layers of sediment cover and compress older ones
Strata
The study of fossils
Paleontology
The theory that changes in the earth’s crust during geological history have resulted chiefly from sudden violent and unusual events
Catastrophism
The theory that changes in the earth’s crust during geological history have resulted from the action of continuous and uniform processes
Uniformitarianism
Inherited characteristics of organisms that enhance their survival and reproduction in specific environments
Adaptations
A process in which individuals that have certain inherited traits tend to survive and reproduce at higher rates than do other individuals because of those traits
Natural selection
The process in which humans modify other species over many generations by selecting and breeding individuals that possess desired traits
Artificial selection
Similarity resulting from common ancestry
Homology
Variations on a structural theme that was present in a common ancestor
Homologous structures
Remnants of features that served a function in the organism’s ancestors
Vestigial structures
A diagram that reflects evolutionary relationships among groups of organisms
Evolutionary tree
The independent evolution of similar features in different lineages
Convergent evolution
Shared by species without common ancestors because of convergent evolution
Analogous