Given a scientific question, generate a correct answer to it.
--------
Question: What term is used to describe birds that hunt, eat mammals, and other birds?

Answer: raptors

Question: What is the name of a microorganism that is considered important for living resources in all ecosystem?

Answer: bacteria

Question: The vertebrate endoskeleton includes a vertebral column, cranium, limbs, and what else?

Answer:
limb girdles