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

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

Crosses between two species where each species serves as both maternal and paternal parent, allowing study of cytoplasmic inheritance effects