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

Behavioral patterns acquired through experience rather than innate programming

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

State of reduced metabolism and body temperature that hummingbirds enter to conserve energy when insufficient energy is available