Which atom is found in all organic substances but rarely in inorganic substances?

Me the formula cacl2 represents the compound

Amap's orientation is typically determined by an

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.