# data[].attributes.body
Ordovician-Silurian mass extinction

The third largest extinction in Earth's history, the Ordovician-Silurian mass extinction had two peak dying times separated by hundreds of thousands of years. During the Ordovician, most life was in the sea, so it was sea creatures such as trilobites, brachiopods and graptolites that were drastically reduced in number.

Late Devonian mass extinction

Three quarters of all species on Earth died out in the Late Devonian mass extinction, though it may have been a series of extinctions over several million years, rather than a single event. Life in the shallow seas were the worst affected, and reefs took a hammering, not returning to their former glory until new types of coral evolved over 100 million years later.

Permian mass extinction

The Permian mass extinction has been nicknamed The Great Dying, since a staggering 96% of species died out. All life on Earth today is descended from the 4% of species that survived.

Triassic-Jurassic mass extinction

During the final 18 million years of the Triassic period, there were two or three phases of extinction whose combined effects created the Triassic-Jurassic mass extinction event. Climate change, flood basalt eruptions and an asteroid impact have all been blamed for this loss of life.

# data[].attributes.body
Molecular evolution is the process of change in the sequence composition of cellular molecules such as DNA, RNA, and proteins across generations. The field of molecular evolution uses principles of evolutionary biology and population genetics to explain patterns in these changes.

# data[].attributes.body
"Ontogeny recapitulates phylogeny" is a catchy phrase coined by Ernst Haeckel, a 19th century German biologist and philosopher to mean that the development of an organism (ontogeny) expresses all the intermediate forms of its ancestors throughout evolution (phylogeny).

# data[].attributes.body
A rudimentary structure in humans corresponding to a functional structure or organ in ancestral animals.

# data[].attributes.body
When very different animals have bones that appear very similar in form or function and seem to be related.

# data[].attributes.body
Variation in the relative frequency of different genotypes in a small population, owing to the chance disappearance of particular genes as individuals die or do not reproduce.

# data[].attributes.body
Natural selection arising through preference by one sex for certain characteristics in individuals of the other sex.

# data[].attributes.headline
DIVERGENT, PARALLEL AND CONVERGENT EVELOUTION

# data[].attributes.subject
DIVERGENT, PARALLEL AND CONVERGENT EVELOUTION

# data[].attributes.body
Divergent Evolution
- The process by which an interbreeding population or species diverges into two or more descendant species, resulting in once similar or related species to become more and more dissimilar.

Parallel Evolution
- Development over time of similar traits in unrelated organisms due to the constraints imposed by similar environments or ways of living

Convergent Evolution
- Convergent evolution is the independent evolution of similar features in species of different lineages.

# data[].attributes.body
Gene flow  also called migration is any movement of individuals, and/or the genetic material they carry, from one population to another.

# data[].attributes.body
The changing of the structure of a gene, resulting in a variant form that may be transmitted to subsequent generations, caused by the alteration of single base units in DNA, or the deletion, insertion, or rearrangement of larger sections of genes or chromosomes.

# data[].attributes.body
The process where by organisms better adapted to their environment tend to survive and produce more offspring.

# data[].attributes.body
Variation
Inheritance
Selection
Time