What is the function of the nerve cell and the sperm cell?

Anton created a chart listing different types of materials. which best complete the chart?

Guard cells control which event? the growth of plants capture of solar energy gas exchange in leaves water absorption in roots

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.