What Does Ontogeny Mean?

What does recapitulation mean?

1 : a concise summary.

2 : the hypothetical occurrence in an individual organism’s development of successive stages resembling the series of ancestral types from which it has descended so that the ontogeny of the individual retraces the phylogeny of its group..

What is the difference between ontogeny and phylogeny?

Ontogeny is the developmental history of an organism within its own lifetime, as distinct from phylogeny, which refers to the evolutionary history of a species. In practice, writers on evolution often speak of species as “developing” traits or characteristics.

How do modern evolutionists view the relationship between ontogeny and phylogeny?

The relationship between ontogeny and phylogeny as viewed by modern evolutionists is that early [but not late] developmental features were shared among the different animal groups present at that time. This gives us the embryological similarities seen in organisms that look very different as adults.

What is ontogenetic behavior?

ONTOGENETIC BEHAVIOR : Each organism has a unique life history that contributes to its behavior. Ontogenetic behavior is due to events that occur over the lifetime of an individual. Ontogenetic history builds on species history to determine when, where, and what kind of behavior will occur at a given moment.

What does Cladistics mean?

: a system of biological taxonomy that defines taxa uniquely by shared characteristics not found in ancestral groups and uses inferred evolutionary relationships to arrange taxa in a branching hierarchy such that all members of a given taxon have the same ancestors.

What does phylogeny mean?

Phylogeny, the history of the evolution of a species or group, especially in reference to lines of descent and relationships among broad groups of organisms.

What is an example of phylogeny?

A phylogeny is often depicted using a phylogenetic tree, such as the simple one below describing the evolutionary relationships between the great apes. The genus Pongo includes orangutans, Pan includes chimpanzees and bonobos, and Homo includes humans, while Gorilla is self-evident.

What is phylogenetic development?

Phylogeny is the study of the evolutionary development of groups of organisms. The relationships are hypothesized based on the idea that all life is derived from a common ancestor. Relationships among organisms are determined by shared characteristics, as indicated through genetic and anatomical comparisons.

What is ontogenetic adaptation?

Ontogenetic adaptations are neurobehavioral characteristics that serve an adaptive function at a specific time in development, disappearing when they are no longer needed. Such adaptations are not simply incomplete versions of adult functions but evolved to deal with a specific problem associated with infancy or youth.

What is recapitulation in psychology?

The theory of recapitulation asserts that the development of the individual retraces the development of the human race; it is the theory that the stages of psychological development of the individual correspond with the stages of sociological development—in other words, that individuals pass through the same linear …

What is the meaning of ontogeny recapitulates phylogeny?

The theory of recapitulation, also called the biogenetic law or embryological parallelism—often expressed using Ernst Haeckel’s phrase “ontogeny recapitulates phylogeny”—is a historical hypothesis that the development of the embryo of an animal, from fertilization to gestation or hatching (ontogeny), goes through …

Who gave biogenetic law?

Ernst Haeckel’sErnst Haeckel’s Biogenetic Law (1866) The biogenetic law is a theory of development and evolution proposed by Ernst Haeckel in Germany in the 1860s. It is one of several recapitulation theories, which posit that the stages of development for an animal embryo are the same as other animals’ adult stages or forms.

What is phylogeny used for?

Phylogeny is a useful tool for taxonomists because it can be used to investigate evolutionary development. Taxonomy led to the study of phylogeny through the framework of dividing organisms into a hierarchy of taxonomic categories such as family, genus and species.

What does reiterate mean?

To reiterate something is to say or do something again, or many times. Let me reiterate: if you repeat yourself, you’re reiterating the thing you originally said.

Is recap short for something?

Recap is a shortened form of recapitulate, “summarize,” from the Latin recapitulare, “go over the main points again.”