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...

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

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

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

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

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

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...

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...

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

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

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...

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...

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

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

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

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'...

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

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

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

a xiphoidal foramen). These morphological variations are hereditary,[citation needed] which can facilitate the categorization of family members when addressing...

A facilitation cascade is a sequence of ecological interactions that occur when a species benefits a second species that in turn has a positive effect...

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

high rejection rate, and is not possible for all women due to anatomical variation. If the flesh above the clitoris where the outer labia meet is fleshy...

the SMART framework has evolved, leading to the emergence of different variations of the acronym. Commonly used versions incorporate alternative words,...

genuine or that such bringing into circulation be facilitated" Alternation (linguistics), a variation in the sound of a word or word part In tailoring...