You observe a drop of pond water under the microscope and see a single-celled organism swimming around with the help of its flagella. The cell contains a nucleus and a plasma membrane, but no cell wall. This organism is most likely a(n): Group of answer choices fungi animal protist plant bacteria

9. wind power creates pollution. water air soil noise

Which type of landforms forms at the plate boundary as a result of divergent stress

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.