Tropical butterflies provide an excellent example of genetic variation within species. In these butterflies ... Consequently, the definition of populations can be refined to include groups ...

This is the most explicit and concise description and definition ... variations useful in some way...” – the words of a lifelong collector who appreciated that individual members of a species ...

Variation - AQA Variation ... of inherited characteristics within a population over time through natural selection, which may result in the formation of a new species. Classification of living ...

Levels of molecular variation could be used ... the formation of a mountain range that split the geographic range of a species in two, thus initiating a process of speciation).

The study marks a major shift in understanding the Sydney funnel-web spider, with each newly identified species occupying distinct regions.