[Solved] The fact that whales have pelvic and leg bones leads to the conclusion that A) they probably evolved from fish. B) ancestral whales had legs. C) having a pelvis is advantageous. D) whales should have functional legs. E) whales did not evolve by natural selection. Sonoran Desert: A vast desert region spanning parts of the southwestern United States and northwestern Mexico, characterized by its unique flora and fauna. Environmental Cue: A signal from the environment that triggers a response in an organism, often influencing its behavior or physiological changes. Naked Mole Rat: A small rodent from the Horn of Africa, known for its eusocial behavior, where individuals live in large colonies with a single breeding queen. Circadian Rhythm: A natural, internal process that regulates the sleep-wake cycle and repeats roughly every 24 hours.