The answer is : C.) Chinchillas are used as models for this research because their hearing ability is similar to that of a human. Hope I helped ;)
Answer: D. Cancer
Cancer is when cells grow at an abnormal and uncontrolled rate.
This might be wrong and i am sorry if it wrong but i think it is A. a planet that produced flowers and seeds on tall stalks and i am sorry again if its wrong
Large gas giants that vary being VERY cold or VERY hot 2 have rings noticable but saturns are the most significant