The iguanid lizard Platynotus semitaeniatus is adapted morphologically and behaviorally to utilize rock crevices to escape predation. Attendant reproductive adaptations reveal an adaptive compromise ...

Reproduction in animals varies from species to species. Some types of reproduction, like parthenogenesis, are more unusual than others. This reproductive method requires only one individual rather ...

1. Life-history theory predicts that investment of acquired energetic resources to a particular trait denies those same resources from being allocated to a different trait, resulting in life-history ...

A team led by biologists at The University of Texas at Arlington has published a study supporting the theory that species that reproduce asexually have more harmful genetic mutations than those ...

For the rose-bellied lizard of Mexico and Southern Texas, not all body parts are created equal. In some male lizards, the left testis has evolved to fill with melanin, so it becomes darker than the ...