7.1 Flashcards
A new species or group of organisms appears suddenly in the fossil record, often within a relatively short geological
time frame.
Abrupt appearance
Structures with similar functions, but differing anatomical structures evolved as a result of convergent evolution and do not indicate recent common ancestry
Analogous structures
The study and comparison of similarities in anatomical structures between
species of organisms that indicate
common ancestry
Anatomical homologies
An organism or group of organisms from
whom a specific species of organisms
has descended.
Ancestor
The idea that all living organisms are descended from one or a few original ancestors from whom they inherited specific traits.
Common ancestry
An organism that is directly related to a previous ancestral generation
Descendent
The available body of factors or information supporting or rejecting a specific scientific theory.
Evidence
A change in the allele frequency within a population over many generations.
Evolution
The chronological collection of the preserved remains of organisms in sedimentary rock layers can show evolutionary changes over time, or be used for relative dating of organisms
Fossil record
Preserved parts or traces of animals and plants that lived in the past
Fossils
The percentage of individuals in a population with a specific genotype.
Genotypic frequency
The theory is that species evolve slowly and gradually over extended periods of time
Gradualism
The study of similarities in structure, physiology, or the development of different species of organisms that indicate common ancestry based on those similarities
shared.
Homologies
Anatomical structures in
organisms that have different functions, but the
same form, indicating
common ancestry.
Homologous structures
Organisms of the same
species inhabiting the
same geographic area.
Population
