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In biology, a pair bond is the strong affinity that develops in some species between a mating pair, often leading to the production and rearing of young and potentially a lifelong bond. Pair-bonding is a term coined in the 1940s [ 1 ] that is frequently used in sociobiology and evolutionary biology circles.
Monogamy is defined as a pair bond between two adult animals of the same species. This pair may cohabitate in an area or territory for some duration of time, and in some cases may copulate and reproduce with only each other. Monogamy may either be short-term, lasting one to a few seasons or long-term, lasting many seasons and in extreme cases ...
A pair of male Magellanic penguins at the San Francisco Zoo shared a burrow for six years and raised a surrogate chick; the pair split when the male of a pair in the next burrow died and the female sought a new mate. [64] Buddy and Pedro, a pair of male African penguins, were separated by the Toronto Zoo to mate with female penguins in 2011.
The overall geometry is further refined by distinguishing between bonding and nonbonding electron pairs. The bonding electron pair shared in a sigma bond with an adjacent atom lies further from the central atom than a nonbonding (lone) pair of that atom, which is held close to its positively charged nucleus. VSEPR theory therefore views ...
A double bond has two shared pairs of electrons, one in a sigma bond and one in a pi bond with electron density concentrated on two opposite sides of the internuclear axis. A triple bond consists of three shared electron pairs, forming one sigma and two pi bonds. An example is nitrogen.
The pair seemingly went public with their relationship after Baumgartner was photographed dropping off Connor at his home. ... “Their close [bond] was a real elephant in the room.” ...
The theory is based on a literature arising from research on prairie voles that pair bonding uses the same mechanisms that mother-infant bonding use as well as the available human evidence. The theory was used to critique a previously asserted evolutionary theory of romantic love proposed by Helen Fisher, [ 3 ] that romantic love is a form of ...
Many male birds have brightly coloured plumage for display. This feather is from a male Indian peafowl Pavo cristatus. Sexual display by a Megaselia female.. Display behaviour is a set of ritualized behaviours that enable an animal to communicate to other animals (typically of the same species) about specific stimuli. [1]