the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock.
Fossils
make (something) suitable for a new use or purpose; modify.
Adapt
a group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding.
Species
the process of developing or being developed.
Development
the study of the physical features of the earth and its atmosphere, and of human activity as it affects and is affected by these, including the distribution of populations and resources, land use, and industries.
Geography
having the same or a similar relation; corresponding, as in relative position or structure.
HomologousStructure
in genealogy, any person to whom two or more persons claim descent; also, the most recent ancestral form or species from which two different species evolved.
CommonAncestor
structures are similar or resembling in certain respects, in function or in appearance but not in evolutionary origin or developmental origin.
AnalogousStructure
relying on or derived from observation or experiment.
Empirical
an individual animal, plant, or single-celled life form.
Organism
deoxyribonucleic acid, a self-replicating material present in nearly all living organisms as the main constituent of chromosomes. It is the carrier of genetic information.
DNA
a distinctive attribute or aspect of something.
Features
any of the pieces of hard, whitish tissue making up the skeleton in humans and other vertebrates.
Bones
a period of ten years.
Decades
the arrangement of and relations between the parts or elements of something complex.
Structure
an anatomical feature that no longer seems to have a purpose in the current form of an organism of the given species.
VestigialStructure
the branch of biology and medicine concerned with the study of embryos and their development.
Embryology
The investigation and comparison of the structures of different organisms.
ComparativeAnatomy
an English naturalist and geologist, best known for his contributions to the science of evolution.
CharlesDarwin
the process by which different kinds of living organisms are thought to have developed and diversified from earlier forms during the history of the earth.
Evolution