Concepts

Natural selection on floral traits that occurs through differential pollinator visitation and resulting differences in reproductive success

The formation of new species involves divergence of phenotypes and development of reproductive isolation, where initial divergence results from divergent natural selection and reproductive isolation a...

Interbreeding between taxa that alters the pool of genetic variation available for population responses to changing environments

Reproduction in which pollen from a flower fertilizes ovules in the same flower or on the same plant

The extent of possible variation in a particular phenotypic trait where different dimensions represent the extent of phenotypic variation in two traits

Reduced fitness in F2 hybrids compared to F1 hybrids, often attributed to genetic incompatibilities between nuclear genes

Selection pressures that oppose each other within or between levels of biological organization