Sentence examples for existence of variation from inspiring English sources

A fundamental requirement for evolutionary change via natural selection is the existence of variation in the population.

We also show the existence of variation between subjects in the perfusion in the territory of the posterior cerebral artery and in hemispheric asymmetry.

The concept of the existence of variation among individuals of the same species (a prerogative for the future understanding of natural selection) is nowhere to be found in either curricula or textbooks--during the whole six years of primary education.

To determine the existence of variation in incidence risk according to age, the total population, the population 18 years and younger, and the population 15 years and younger (three population groups) were used to compute incidence risk.

These results suggest the existence of variation due to genetic factors that was captured by either the pedigree or the markers.

Strictly speaking, this means that patients have no entitlement to specific services; this partly explains the existence of variation in local provision known as the 'postcode lottery' [ 1].

These five contextual models show the existence of variations within HRM depending on the organizational configuration.

Moreover, the existence of variations in the odor fingerprints of different asphalt binders heated at the same temperature was assessed.

Amino acid polymorphisms may occur naturally due to the existence of variations within and between viral strains or as the result of mutations associated with drug resistance.

Visser et al. [32] suggested the existence of variations of a saturable mechanism of tubular excretion, explaining the accumulation of antibiotics during treatments with continuous infusions even in patients with normal renal function.

We hypothesised the existence of variations according to age, gender and dominancy of limb.