Please help me answer these questions, more than one answer may be correct for each: 1) How can diabetes insipidus occur? A) Kidneys not responding to vasopressin B) Abnormal thirst mechanism C) Lack of vasopressin production in the hypothalamus D) Transiently during pregnancy E) Drinking too much soda 2) Which of the following statements are true about protonephridia? A) They have a nephridiopore, which is an opening of a blind-ended duct. B) They are only present in animals with true body cavities C) have a conducting tubule. D) They have a coelom. E) They create lower pressure using a ciliated cell known as a flame cell..