environmental perturbations

См. также в других словарях:

• Mutational robustness — describes the extent to which an organism’s phenotype remains constant in spite of mutation.[1] Natural selection can directly induce the evolution of mutational robustness only when mutation rates are high and population sizes are large.[2] The… …   Wikipedia

• Lyari River — Geobox River name = Lyari native name = other name = other name1 = image size = image caption = country = Pakistan country1 = country2 = state = Sindh state1 = state2 = region = region1 = district = district1 = city = Karachi city1 = length = 50… …   Wikipedia

• Mesocosm — A mesocosm is an experimental tool that brings a small part of the natural environment under controlled conditions. In this way mesocosms provide a link between observational field studies that take place in natural environments, but without… …   Wikipedia

• death — /deth/, n. 1. the act of dying; the end of life; the total and permanent cessation of all the vital functions of an organism. Cf. brain death. 2. an instance of this: a death in the family; letters published after his death. 3. the state of being …   Universalium

• Genetic architecture — refers to the underlying genetic basis of a phenotypic trait. A synonymous term is the genotype phenotype map , the way that genotypes map to the phenotypes.The genotype phenotype map has been analyzed in terms of several principle axes:… …   Wikipedia

• Enhancer (genetics) — In genetics, an enhancer is a short region of DNA that can be bound with proteins (namely, the trans acting factors, much like a set of transcription factors) to enhance transcription levels of genes (hence the name) in a gene cluster. While… …   Wikipedia

• Canalisation (genetics) — Norms of reaction for two genotypes. Genotype B shows a strongly bimodal distribution indicating differentiation into distinct phenotypes. Each phenotype is buffered against environmental variation it is canalised. Canalisation (canalization in… …   Wikipedia

• Space debris — populations seen from outside geosynchronous orbit (GEO). Note the two primary debris fields, the ring of objects in GEO, and the cloud of objects in low earth orbit (LEO) …   Wikipedia

• Forçage volcanique — Hiver volcanique Un hiver volcanique est une baisse de la température provoquée par des cendres volcaniques et des gouttelettes d acide sulfurique, dues à une forte éruption volcanique, présents dans l atmosphère et réfléchissant les rayons du… …   Wikipédia en Français

• Hiver Volcanique — Un hiver volcanique est une baisse de la température provoquée par des cendres volcaniques et des gouttelettes d acide sulfurique, dues à une forte éruption volcanique, présents dans l atmosphère et réfléchissant les rayons du soleil. On parle… …   Wikipédia en Français

• Hiver volcanique — Un hiver volcanique est une baisse de la température provoquée par des cendres volcaniques et des gouttelettes d acide sulfurique, dues à une forte éruption volcanique, présentes dans l atmosphère et réfléchissant les rayons du soleil. On parle… …   Wikipédia en Français