What are jaws and limbs characteristics of?

Jaws and limbs are characteristics of vertebrates, particularly within the phylum Chordata. Jaws, derived from modified gill arches, allow for more efficient feeding mechanisms, enabling animals to grasp and process food. Limbs, which may vary in form and function across species, facilitate movement and interaction with the environment, supporting activities such as walking, swimming, or flying. Together, these features contribute significantly to the adaptability and evolutionary success of vertebrate animals.