What are the three periods of ontogeny?

With this background, of special importance in the current account are three relatively distinct periods of ontogeny, each with its own set of adaptive challenges: (i) infancy and toddlerhood (before weaning, approximately 0–3 years); (ii) early and middle childhood (weaning to sexual maturity, approximately 4–12 years …

What do you mean by ontogenesis?

Medical Definition of ontogeny : the development or course of development of an individual organism. — called also ontogenesis.

What is Phylogenesis and ontogenesis?

Ontogeny refers to the development or development history of an individual organism, while phylogeny refers to the study of relationships among different groups of organisms and their evolutionary development.

What is ontogenetic behavior?

The ontogeny of behaviour is commonly seen as the elaboration and perfection of behaviour as an individual grows up. The ways in which these things happen and the conditions which have to be fulfilled for them to occur are central problems in the study of behavioural development.

What is an example of ontogeny?

Examples of ontogenetic adapta- tions are provided from the prenatal (e.g., placenta in mammals), infancy (e.g., nursing and rooting reflex; neonatal imitation), and childhood (e.g., overestimation of one’s abilities, egocentricity) periods.

What is the difference between ontogeny and Embryology?

Earlier work in embryology characteristically focused on prenatal development. Modern concepts consider post-natal development, although not usually as dynamic, of equal importance. The embryology of the individual and all subsequent developmental events is called ontogeny.

What is the study of phylogenetics?

Phylogenetics is the study of evolutionary relationships among biological entities – often species, individuals or genes (which may be referred to as taxa).

What is phylogenesis in biology?

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 ontogenetic?