Fermentation is carried out regularly, and not only during oxygen emergencies, by what organisms? a) most animals b) many fungi and bacteria c) plants, during the night time eliminate d) all organisms, all of the time

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.