Habitats provide all the following EXCEPT... * O food
O water
O oxygen
O shelter
O other organisms
○none of the above​

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.

What best describes emerging scientific ideas

Some substances but not other can cross the (blank) membrane of a cell