Which of the following families includes species which have horns present?

The family that includes species with horns present is Bovidae. This family encompasses a wide variety of animals known collectively as bovids, which include cattle, goats, sheep, and antelopes. Members of this family typically have true horns, which are permanent structures made of a bony core covered in keratin. Both males and females can have horns, but in many species, they are more developed in males, often playing a significant role in sexual selection and social interactions.

In contrast, the other families mentioned do not share this characteristic. The Felidae family includes cats, which typically have retractable claws and do not possess horns. The Cervidae family consists of deer species that have antlers, which are different from horns as they are shed and regrown annually, generally found only on males. The Equidae family includes horses, zebras, and donkeys, which also lack horns entirely, having evolved other adaptations for their survival. Understanding these distinctions helps clarify the unique traits that characterize different animal families and their adaptations within ecosystems.