The theory of facilitated variation demonstrates how seemingly complex biological systems can arise through a limited number of regulatory genetic changes...

course by forces internal to the organism. Orthogenesis assumes that variation is not random but is directed towards fixed goals. Selection is thus powerless...

genes. This supports Marc Kirschner and John C. Gerhart's theory of Facilitated Variation, which states that morphological evolutionary novelty is generated...

most recent book, Kirschner and Gerhart proposed a new theory of "facilitated variation" that aims to answer the question: How can small, random genetic...

arbitrary biases in the generation of variation. The theory of arrival biases does not require or imply facilitated variation or directed mutation and is not...

organism Revolutionary change in phenotype can occur through mutation, facilitated variation or threshold events Repeated evolution in isolated populations can...

Heliconius melpomene, which are Müllerian mimics. In so-called facilitated variation, their wing patterns arose in different evolutionary events, but...

can be explained in terms of simpler precursors. The theory of facilitated variation challenges irreducible complexity. Marc W. Kirschner, a professor...

Furthermore, random fertilization also contributes to variation. Variation and recombination can be facilitated by transposable genetic elements, endogenous retroviruses...

Forebrain dehydration sensing facilitated by the anterior communicating artery: How hemodynamic properties facilitate more good dehydration sensing in...

Diurnal mood variation or morning depression is a prominent depression symptom characterized by gradual mood improvement through the day, reaching its...

can emerge with little or no initial genetic modification (see facilitated variation), and provide the new raw material on which natural selection can...

orients and permutes the corners when the edges are oriented, or Winter Variation (also known as Valk Last Slot, or VLS), which finishes OLL while inserting...

Variation of traits, both genotypic and phenotypic, exists within all populations of organisms. However, some traits are more likely to facilitate survival...

replaced by an A in a minority of individuals. The two possible nucleotide variations of this SNP – G or A – are called alleles. SNPs can help explain differences...

nearly periodic 11-year change in the Sun's activity measured in terms of variations in the number of observed sunspots on the Sun's surface. Over the period...

churches simply use the cafe model as a way to build community, facilitating variation within their normal service structure and within the confines of...

if the main axis of variation is aligned with the direction of selection, covariation (genetic or phenotypic) will facilitate the rate of adaptive evolution;...

Variations of golf include methods of scoring, starting procedures, playing formats, golf games, and activities based on or similar to the sport of golf...

further sub-variants, for example Horde chess is a variation upon Dunsany's Chess. Some variations are created for the purpose of composing interesting...

Evolutionary capacitance is the storage and release of variation, just as electric capacitors store and release charge. Living systems are robust to mutations...

genetic variation in our species, but shows that such variation is not consistent with biological definitions of race. Nor does that variation map precisely...

There are important gains to lowering trade costs and facilitating trade with some variation across countries and sectors (Francois et al., 2005; OECD...

Genetics is the study of genes, genetic variation, and heredity in organisms. It is an important branch in biology because heredity is vital to organisms'...

sex development (DSDs), also known as differences in sex development or variations in sex characteristics (VSC), are congenital conditions affecting the...

disability purely to inherent deficits. It instead situates human cognitive variation in the context of biodiversity and the politics of minority groups. Some...

created by co sputtering from separate targets of Ni and Mg to facilitate variations in composition. Single-target d.c. magnetron sputtering could be...

(2018). "Systematic review of facilitated communication 2014-2018 finds no new evidence that messages delivered using facilitated communication are authored...

distinguish between members of a social group, as each individual upholds some variation in their specific calls. Additionally, the level of pant-hooting in chimps...

(IOP). There are many glaucoma surgeries, and variations or combinations of those surgeries, that facilitate the escape of excess aqueous humor from the...