# data[].attributes.body
When two or more species reciprocally affect each other's evolution through the process of natural selection.

# data[].attributes.body
When different organisms independently evolve similar traits.

# data[].attributes.body
The dying out of a species.

# data[].attributes.body
The differences in the timing of critical reproductive events prevent members of closely related species, which could otherwise breed with one another, from mating and producing hybrid offspring.

# data[].attributes.body
The separation of two populations of the same species or breeding group by a physical barrier.

# data[].attributes.body
When members of a population diverge in their behaviors over time.

# data[].attributes.body
Among sexual organisms, individuals that are able to interbreed belong to the same species.

# data[].attributes.body
How a new kind of plant or animal species is created.

# data[].attributes.body
The reduction in genetic variation that results when a small subset of a large population is used to establish a new colony.

# data[].attributes.body
The change in the frequency of an existing gene variant in a population due to random sampling of organisms.

# data[].attributes.body
Extreme values for a trait are favored over intermediate values.

# data[].attributes.body
Genetic diversity decreases as the population stabilizes on a particular trait value.

# data[].attributes.body
A single phenotype is favored, causing the allele frequency to continuously shift in one direction.

# data[].attributes.body
The organs that have no apparent function and are considered to be the residual parts from the past ancestors.

# data[].attributes.body
Similarity of function and superficial resemblance of structures that have different origins.

# data[].attributes.body
Structures that are similar in related organisms because they were inherited from a common ancestor.

# data[].attributes.body
An ancestor that two or more descendants have in common.

# data[].attributes.headline
Natural Selection (Survival of the fittest)

# data[].attributes.subject
Natural Selection (Survival of the fittest)

# data[].attributes.body
The process through which populations of living organisms adapt and change.

# data[].attributes.body
An event that drastically reduces the size of a population.

# data[].attributes.body
Adaptation is the biological mechanism by which organisms adjust to new environments or to changes in their current environment.

# data[].attributes.body
Fitness is the quantitative representation of natural and sexual selection within evolutionary biology. It can be defined either with respect to a genotype or to a phenotype in a given environment.

# data[].attributes.body
The remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock.

# data[].attributes.body
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.