What conclusion did francesco redi draw after performing his experiment with flies and meat? a. flies can spontaneously generate from decaying meat. b. flies cannot spontaneously generate from decaying meat. c. decaying meat turns into maggots. d. maggots breed best when kept with decaying meat.

Which of the following best describes the purpose of the parathyroid hormone? a. it decreases the blood calcium level and decreases blood phosphorus level. b. it decreases the blood calcium level and increases the blood phosphorus level. c. it increases the blood calcium level and increases blood phosphorus level. d. it increases the blood calcium level and decreases blood phosphorus level.